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Cold water immersion and recovery from strenuous exercise; a meta-analysis.

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Cryotherapy in sport; a warm reception for the translation of evidence into applied practice

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Timo Vuorimaa HRV-variation presentation

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From Kimmo Kantosalo on November 2nd, 2018

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You can pick Firstbeat measures from library from Matias. 2 weeks time you have return. Load battery first when you start measurements. 

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You can pick Firstbeat measures from library from Matias. 2 weeks time you have return. Load battery first when you start measurements. 

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HRV info suomeksi

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Firstbeat tuo ihmisen fysiologian digitaalisen mallintamisen hyödyt kaikkien saataville tarjoten lähes laboratoriotason mittaustarkkuuden.

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Why is Heart Rate Variability Important?

Studying the heart provides us with a vast amount of information about our body. From beat to beat, heart rate is constantly changing to meet the needs of life. Heart rate variability (HRV) means the variation in time between consecutive heartbeats. It is universally accepted as a non-invasive marker of autonomic nervous system (ANS) activity. A variety of physiological phenomena affect HRV, including:

Inhalation and exhalation, control of breathing

Autonomic Nervous System (ANS) adjustments

Hormonal reactions

Metabolic processes and energy expenditure

Physical activity, exercise and recovery from physical activity

Movements and changes in posture

Cognitive processes and mental load

Stress reactions, relaxation, and emotional reactions

Making sense of HRV

Heart rate variability increases during relaxing and recovering activities and decreases during stress. Accordingly, HRV is typically higher when the heart is beating slowly and decreases as the heart beats more quickly. In other words, heart rate and HRV have a generally inverse relationship.

HRV changes from day to day based on activity levels and amount of work-related stress. In addition to these external stress factors, internal stress factors cause variation daily HRV levels. Internal stress factors include poor nutrition, alcohol use, illness, etc.

Higher fitness levels usually results in increased HRV compared to people with lower fitness levels. High HRV is commonly viewed as an indicator of a healthy heart.

HRV can be measured with for example time and frequency domain methods for evaluating sympathovagal balance (i.e., the balance between sympathetic and parasympathetic activity).
Read more about how Firstbeat can turn heart rate variability data into insights about stress, recovery, and exercise.

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Heart Rate Variability (HRV) - Firstbeat Science

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Studying the heart provides us with a vast amount of information about our body. From beat to beat, heart rate is constantly changing to meet the needs of life. Heart rate variability (HRV) means the variation in time between consecutive heartbeats. It is universally accepted as a non-invasive marker of autonomic nervous system (ANS) activity.

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From Kimmo Kantosalo on September 10th, 2020

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Massage and performance recovery a meta-analytical review

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Effects of Postexercise Sauna Bathing on Recovery of Swim Performance

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Monitoring training status with HR measures; do all roads lead to Rome

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Sleep interventions for performance, mood and sleep outcomes in athletes; A systematic review and meta-analysis

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Effects of training and competition on the sleep of elite athletes; a systematic review and meta-analysis

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Foam Rolling as a recovery tool after an intense bout of physical activity

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(ver. 3.5.0 released in May 2021)

D ownload Kubios HRV Standard installer from the links below and install it into your computer (you will need the license key to activate the software on your computer). NOTE: Matlab Runtime (MCR) version R2021a, which is required to run Kubios HRV Standard, is included in Windows and macOS installers (macOS installer downloads the MCR when necessary).

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(ver. 3.5.0 released in May 2021) D ownload Kubios HRV Standard installer from the links below and install it into your computer (you will need the license key to activate the software on your computer). NOTE: Matlab Runtime (MCR) version R2021a, which is required to run Kubios HRV Standard, is included in Windows and macOS installers (macOS installer downloads the MCR when necessary).

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Heart rate variability, Heart rate variability measures tiny variations between the heartbeats. Orthostatic measurements is a HRV test where you lying down and standing up and measure again.

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A few practical ways:

Protocol (takes ~5 minutes):

Athlete lies down for 2-3 minutes → record heart rate/HRV

They stand up

Record the response over the next 2-3 minutes

Tools you can use:

Chest strap (Polar H10) + an app like HRV4Training or Kubios — most accurate

Fingertip pulse oximeter — cheaper, less accurate

Smartwatch (Garmin, Whoop, Oura Ring) — convenient but varies in accuracy

What you're looking at:

How much does heart rate spike on standing?

How quickly does it settle back down?

A slow, sluggish response = poor recovery

Practically with a team:

Do it every morning before training, same time each day

Log it consistently — trends matter more than single readings

Some teams use apps that flag athletes who show concerning patterns so coaches can adjust their training load

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That you know if your athletes are adapting to training, that HRV can show overtraining.

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"Firstbeat’s process uses heart rate variability (HRV) data combined with advanced mathematical and signal processing methods to document an individual’s autonomic nervous system regulation. Starting from heartbeat data, the Firstbeat analytic engine computes and creates a digital model of the human body describing key physiological processes such as oxygen consumption, energy expenditure, excess post exercise oxygen consumption (EPOC), as well as stress and recovery reactions."

"HRV is the measurement of the variation in time between consecutive heartbeats, also known as the R-R interval. It provides information about the balance between the sympathetic (fight-or-flight) and parasympathetic (rest-and-digest) branches of the autonomic nervous system."

"Orthostatic measurements (or vital signs) are blood pressure and heart rate taken while lying down, then again while standing (or sitting) to diagnose postural hypotension or tachycardia" Google AI "An orthostatic test (lying-to-standing) combined with Heart Rate Variability (HRV) monitoring assesses autonomic nervous system balance, helping to track fatigue, training readiness, and recovery"

"When it comes to monitoring individual athletes, “normal” variations in the measures (e.g., within-athlete day-to-day variability, as measured by the typical error, TE, expressed as a coefficient of variation, CV) is the primary variable to consider (Hopkins, 2000a). The variability in each measure can be obtained either from the literature, or from repeated data collected in your own athletes (Hopkins, 2004). The magnitude of these variations depends both on the HR variable and the recording conditions (CV range: 3–190%, Table 1) (Sandercock et al., 2005)."

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It can help us identify the training adaptations, as well as the signs of competition tapering. Is also a tool for identifying fatigue, can be to reveal high levels of accumulated fatigue or dangerous overtraining state.

For recovery, post exercise HRR is an sign of recovery, depending if it is increasing or decreasing