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Affiliations

¹ School of Sport Sciences, Universidad Europea de Madrid, 28670 Villaviciosa de Odón (Madrid), Spain.

² IGOID Research Group, Department of Physical Activity and Sport Sciences, University of Castilla-La Mancha, 45071 Toledo, Spain.

Free PMC article

Free PMC article

Affiliations

¹ School of Sport Sciences, Universidad Europea de Madrid, 28670 Villaviciosa de Odón (Madrid), Spain.

² IGOID Research Group, Department of Physical Activity and Sport Sciences, University of Castilla-La Mancha, 45071 Toledo, Spain.

Abstract

Background: The aim of this study was to compare the validity of two different GPS device models used for time-motion analyses in ecological testing of football.

Methods: Ten healthy male players from a Spanish university football team participated in this study. The team sport simulation circuit (TSCC) used was based on previous research examining the validity and interunit reliability of different GPS systems. Participants were required to complete eight laps of the TSSC, resulting in a total distance of 1320 m. The GPS units used for the current study were the 18 Hz StatsSport Apex Pro and 18 Hz RealTrack WIMU Pro. Participants were required to wear either of the two GPS units during the test. To establish the construct validity of GPS as a measure of V max, timing lights were used as a gold standard.

Results: The results clearly suggest that it is not possible to use the same 18 Hz GPS model or interchange it. The measurement can be considered precise when the noise is at least equal to or lower than the smallest worthwhile change. In this case, all standard deviation in measurement error was higher than the smallest worthwhile change. This is due to an inconsistency in the data processing of each trademark.

Conclusions: It is important to prevent a club using different GPS trademarks at the same time, since it is not possible to compare in any case any type of result obtained between different trademarks.

Keywords: football external load; football movement patterns; football technology.

Conflict of interest statement

The authors declare no conflict of interest.

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# data[].attributes.attachment_link.keywords[]
national center for biotechnology information

# data[].attributes.attachment_link.title
Comparison between Two Different Device Models 18 Hz GPS Used for Time-Motion Analyses in Ecological Testing of Football - PubMed

# data[].attributes.attachment_link.description
The .gov means it's official. Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site. The site is secure. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

# data[].attributes.attachment_link.readable_text
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Randomized Controlled Trial

doi: 10.3390/nu12010188.

Affiliations

¹ School of Physiotherapy, Faculty of Health Sciences, Universidad Francisco de Vitoria, 28223 Madrid, Spain.

² Faculty of Sport Sciences, University of Murcia, 30720 Murcia, Spain.

³ Center for Translational Research in Physiotherapy, Department of Pathology and Surgery. Universidad Miguel Hernández, Elche, 03550 San Juan, Spain.

Free PMC article

Randomized Controlled Trial

Free PMC article

Affiliations

¹ School of Physiotherapy, Faculty of Health Sciences, Universidad Francisco de Vitoria, 28223 Madrid, Spain.

² Faculty of Sport Sciences, University of Murcia, 30720 Murcia, Spain.

³ Center for Translational Research in Physiotherapy, Department of Pathology and Surgery. Universidad Miguel Hernández, Elche, 03550 San Juan, Spain.

Abstract

Whereas beetroot juice (BJ) supplementation is shown to increase physical performance in endurance activities, its benefits in team sports has been barely studied. In this randomized placebo-controlled study, we investigated the effects of BJ acute supplementation in improving neuromuscular performance and physical match activity in basketball. Ten young male competitive basketball players aged 15-16 years received 140 mL of BJ or placebo (PLA) on two separated days in a balanced cross-over design. Testing sessions comprised a neuromuscular test battery consisting of a countermovement jump (CMJ), isometric handgrip strength, 10-m/20-m sprint and agility T-test, followed by a 40-minute simulated basketball match. Physical match activity (distances, speeds, accelerations, and decelerations) was monitored using an inertial tracking system (Wimu Pro TM) Results revealed no significant effects of BJ on CMJ ( p = 0.304, ES = 0.13), isometric handgrip strength ( p = 0.777, ES = 0.06), 10-m ( p = 0.820, ES = 0.10), and 20-m sprint ( p = 0.540, ES = 0.13), agility T-test ( p = 0.979, ES ≤ 0.01) and any physical match demands ( p > 0.151, ES = 0.13-0.48). Acute moderate doses of BJ (12.8 mmol of NO ₃⁻) was not effective in improving neuromuscular performance (jump height, isometric handgrip strength, sprint, and agility) or physical match requirements in young trained basketball players the day of the competition.

Keywords: GPS; ergogenic aid; match demands; nitric oxide; team sports.

Conflict of interest statement

The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

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References

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Maughan R.J., Burke L.M., Dvorak J., Larson-Meyer D.E., Peeling P., Phillips S.M., Rawson E.S., Walsh N.P., Garthe I., Geyer H., et al. IOC consensus statement: Dietary supplements and the high-performance athlete. Br. J. Sports Med. 2018;52:439-455. doi: 10.1136/bjsports-2018-099027. - DOI - PMC - PubMed

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# data[].attributes.attachment_link.keywords[]
national center for biotechnology information

# data[].attributes.attachment_link.title
Does Acute Beetroot Juice Supplementation Improve Neuromuscular Performance and Match Activity in Young Basketball Players? A Randomized, Placebo-Controlled Study - PubMed

# data[].attributes.attachment_link.description
Whereas beetroot juice (BJ) supplementation is shown to increase physical performance in endurance activities, its benefits in team sports has been barely studied. In this randomized placebo-controlled study, we investigated the effects of BJ acute supplementation in improving neuromuscular performa ...

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THE EFFECTIVENESS OF EXERCISE SPIN SERVE MODEL ON LAWN TENNIS BASED KINOVEA

Ians Aprilo Universitas Negeri Makassar

Moch. Asmawi Universitas Negeri Jakarta

James Tangkudung Universitas Negeri Jakarta

Keywords: spin serve, exercise, lawn tennis, kinovea.

Abstract

The purpose this article is explain about influence the exercise spin serve on lawn tennis model based kinovea. The article will expose result of research in an effort to improved spin serve skills on lawn tennis. Method the research is experiment pretest - posttest control group design. The participant is 60 college student which can played lawn tennis with average abilities. The participant divided two group, the treatment and control group, 30 participants each. The research was conducted on sport science faculty state University of Makassar for two months. Implementation of treatment thrice e weeks and total 18 meetings. Data analysis have used parametric statistic. Researchers have tested data normality, homogeneity, as well independent and paired test, have used computer with SPSS program. The results of study have shown that there have been significant differences before and after exercise using spin serve model based of kinovea. Statistical result obtained by the t value of 3.08, the average value of -8.60m degree of freedom = 29, and sig. 0.000 (P<0.05). There has also been a significant difference between the treatment and control groups, it is obtained the statistical t value of 13.36, degree of freedom=58, and the sig. 0.000 (P<0.05).

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# data[].attributes.attachment_link.title
THE EFFECTIVENESS OF EXERCISE SPIN SERVE MODEL ON LAWN TENNIS BASED KINOVEA

# data[].attributes.attachment_link.description
Ians Aprilo Universitas Negeri Makassar Moch. Asmawi Universitas Negeri Jakarta James Tangkudung Universitas Negeri Jakarta Keywords: spin serve, exercise, lawn tennis, kinovea. The purpose this article is explain about influence the exercise spin serve on lawn tennis model based kinovea. The article will expose result of research in an effort to improved spin serve skills on lawn tennis.

# data[].attributes.attachment_link.readable_text
The .gov means it's official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Abstract

Background: Scapular stabilization exercises can improve forward shoulder posture in young women. However, the effects of optimal exercise protocols on neck and shoulder postures, scapular muscle imbalance and thoracic kyphosis are still unclear.

Objectives: To investigate the effects of scapular stabilization exercises on neck and shoulder postures, scapular muscle imbalance and thoracic kyphosis in young women with upper crossed syndrome.

Methods: Thirty-nine women aged 18-25 years with upper crossed syndrome were recruited. Participants were randomly allocated intotwo groups. The exercise group performed scapular stabilization exercises using elastic bands at 10 repetitions/set, 3 sets/day, and 3 days/week for 4 weeks. The control group did not perform any exercises during the experimental period. The cervical and shoulder angles were evaluated using the Kinovea program. A caliper, handheld dynamometer and flexi ruler were used to evaluate the length of the pectoralis minor, strength of the scapular stabilizer muscles and degree of the mid-thoracic curve, respectively.

Results: The exercise group showed significant differences (p< 0.05) in the increase in cervical and shoulder angle, length of the pectoralis minor, and strength of the scapular muscles, except in the degree of mid-thoracic curve compared to the control group.

Conclusion: This study indicated that scapular stabilization exercises can improve forward head and shoulder posture, increase the flexibility of the pectoralis minor and strengthen the scapular muscles.

Keywords: Upper crossed syndrome; muscle imbalance; posture; scapular stabilization exercise.

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# data[].attributes.attachment_link.keywords[]
national center for biotechnology information

# data[].attributes.attachment_link.title
Effects of scapular stabilization exercises on posture and muscle imbalances in women with upper crossed syndrome: A randomized controlled trial - PubMed

# data[].attributes.attachment_link.description
The .gov means it's official. Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site. The site is secure. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

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Abstract

Studies examining pacing strategies during 4000-m cycling time trials (TTs) typically ensure that participants are not prefatigued; however, competitive cyclists often undertake TTs when already fatigued. This study aimed to determine how TT pacing strategies and sprint characteristics of cyclists change during an intensified training period (mesocycle). Thirteen cyclists regularly competing in A- and B-grade cycling races and consistently training (>10 h/wk for 4 [1] y) completed a 6-wk training mesocycle. Participants undertook individually prescribed training, using training stress scores (TrainingPeaks, Boulder, CO), partitioned into a baseline week, a build week, 2 loading weeks (designed to elicit an overreached state), and 2 recovery weeks. Laboratory-based tests (15-s sprint and TT) and Recovery-Stress Questionnaire (RESTQ-52) responses were repeatedly undertaken over the mesocycle. TT power output increased during recovery compared with baseline and loading weeks (P = .001) with >6-W increases in mean power output (MPO) detected for 400-m sections (10% bins) from 1200 to 4000 m in recovery weeks. Decreases in peak heart rate (P < .001) during loading weeks and postexercise blood lactate (P = .005) during loading week 2 and recovery week 1 were detected. Compared with baseline, 15-s sprint MPO declined during loading and recovery weeks (P < .001). An interaction was observed between RESTQ-52 total stress score with a 15-s sprint (P = .003) and with a TT MPO (P = .04), indicating that participants who experienced greater stress during loading weeks exhibited reduced performance. To conclude, intensified endurance training diminished sprint performance but improved 4000-m TT performance, with a subtle change in MPO evident over the last 70% of TTs.

Keywords: HIIT; exercise regulation; power output; sprint; training overload.

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national center for biotechnology information

# data[].attributes.attachment_link.title
Effect of Intensified Endurance Training on Pacing and Performance in 4000-m Cycling Time Trials - PubMed

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Studies examining pacing strategies during 4000-m cycling time trials (TTs) typically ensure that participants are not prefatigued; however, competitive cyclists often undertake TTs when already fatigued. This study aimed to determine how TT pacing strategies and sprint characteristics of cyclists c ...

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Abstract

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national center for biotechnology information

# data[].attributes.attachment_link.title
Estimating Running Performance Combining Non-invasive Physiological Measurements and Training Patterns in Free-Living - PubMed

# data[].attributes.attachment_link.description
In this work, we use data acquired longitudinally, in free-living, to provide accurate estimates of running performance. In particular, we used the HRV4Training app and integrated APIs (e.g. Strava and TrainingPeaks) to acquire different sets of parameters, either via user input, morning measurement ...

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Affiliations

¹ Faculty of Sports Sciences, University of Murcia, 30720 San Javier, Spain.

² Faculty of Educational Sciences, University of Almería, 04120 Almería, Spain.

³ SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, 04120 Almería, Spain.

⁴ BIOVETMED & SPORTSCI Research Group, Department of Physical Activity and Sport, Faculty of Sport Sciences, University of Murcia, 30720 San Javier, Spain.

Free PMC article

Free PMC article

Affiliations

¹ Faculty of Sports Sciences, University of Murcia, 30720 San Javier, Spain.

² Faculty of Educational Sciences, University of Almería, 04120 Almería, Spain.

³ SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, 04120 Almería, Spain.

⁴ BIOVETMED & SPORTSCI Research Group, Department of Physical Activity and Sport, Faculty of Sport Sciences, University of Murcia, 30720 San Javier, Spain.

Abstract

Although there is a wide range of validated devices to measure vertical jump height, the degree of interchangeability among them is currently unknown.

Aims: The purpose of this study was to examine the concurrent validity and reliability of multiple devices to measure jump height in men's handball players.

Methods: Sixteen players (age = 24.0 ± 3.7 years old) performed three types of jumps (n= 144-squat jump (SJ), countermovement jump (CMJ) and Abalakov jump (ABK)) on a contact platform (CHRONOJUMP ®) while simultaneously being measured with two inertial devices (WIMU ® and VERT ®) and recorded with a high-speed camera. Vertical jump height was analyzed according to each type of jump.

Results: The t-test showed statistically significant differences ( p = 0.001) between the contact platform (reference standard) and the rest of the tools that tended to overestimate jump height in all jumps. SJ and CMJ proved to be the jump tests with the most stable reliability values in all devices (ICC: 0.92-0.98), except in the comparison with VERT ®.

Conclusions: Although all the analyzed devices proved to be valid and reliable in previous studies, they are not interchangeable. Therefore, it is suggested to always use the same type of device to evaluate vertical height jump.

Keywords: inertial devices; microtechnology; reproducibility; stretch-shortening cycle; team sports; testing; wearable.

Conflict of interest statement

The authors declared no conflict of interest regarding the publication of this manuscript.

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Grant support

This research received no external funding.

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national center for biotechnology information

# data[].attributes.attachment_link.title
Concurrent Validity and Reliability of Devices to Measure Jump Height in Men's Handball Players - PubMed

# data[].attributes.attachment_link.description
Although all the analyzed devices proved to be valid and reliable in previous studies, they are not interchangeable. Therefore, it is suggested to always use the same type of device to evaluate vertical height jump.

# data[].attributes.attachment_link.keywords[]
national center for biotechnology information

# data[].attributes.attachment_link.title
Evaluation of a Reactive Agility Assessment Device in Youth Football Players - PubMed

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Hoffman, JR. Evaluation of a reactive agility assessment device in youth football players. J Strength Cond Res 34(12): 3311-3315, 2020-The purpose of this study was to examine the reliability and validity of the Blazepod reactive agility device on sport-specific movements in competitive youth footba ...