ArticleJournal of human kinetics2022
Validity and Reliability of Strategy Metrics to Assess Countermovement Jump Performance using the Newly Developed
Article in Journal of human kinetics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06412809 (Combined Land- and Water-Based Core and Lower Extremity Strength Training in Improving the Jump Performance Among Volleyball and Basketball Players), which is not on this map. Cited by 26 papers, 2 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Combined Land- and Water-Based Core and Lower Extremity Strength Training in Improving the Jump Performance Among Volleyball and Basketball Players: A Randomized Controlled Trial
Who cites it
26 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Validity and reliability of "My Jump app" to assess vertical jump performance: a meta-analytic review.Scientific reports · 2023Pooled it
- Building for the Future: A Systematic Review of the Effects of Eccentric Resistance Training on Measures of Physical Performance in Youth Athletes.Sports medicine (Auckland, N.Z.) · 2023Pooled it
- The Effects of a Phytochemical Supplement Blend on Markers of Exercise-Induced Muscle Damage: A Randomised Controlled Trial.Nutrients · 2026Trial
- Riding a Golf Cart Versus Walking: A Study on the Physiological and Performance Differences in Tournament Golf.European journal of sport science · 2026Trial
- Effects of eight weeks incremental elastic resistance training on roundhouse kick quality and physical performance in Taekwondo athletes in a randomized controlled trial.Scientific reports · 2025Trial
- The Effect of Acute Dehydration upon Muscle Strength Indices at Elite Karate Athletes: A Randomized Crossover Study.Nutrients · 2025Trial
- Accuracy of the My Jump Lab App for Two Methods of Single-Leg Countermovement Jump Height Assessment.Journal of clinical medicine · 2026Article
- Smartphone-Based Assessment of the Stretch-Shortening Cycle: Validity and Reliability of the My Jump Lab App for Measuring the Dynamic Rebound Index.Sensors (Basel, Switzerland) · 2026Article
- Velocity- and Power-Oriented Force-Velocity Characteristics Differentiate Competitive Olympic-Style Weightlifting Performance.Journal of functional morphology and kinesiology · 2026Article
- Acute differences in field-based physical performance between Ramadan-type fasting and non-fasting conditions in 10-11-year-old youth soccer players.Frontiers in sports and active living · 2026Article
- From Laboratory to Field: Concurrent Validity of Kinovea's Linear Kinematics Tracking Tool for Semi-Automated Countermovement Jump Analysis.Sensors (Basel, Switzerland) · 2025Article
- Change-of-Direction Deficit and Positional Physical Profiles in Youth Futsal Players: A Cross-Sectional Study.Sports (Basel, Switzerland) · 2025Article
- Concurrent Validity and Reliability of Two Mobile Phone Applications for Measuring Vertical Jumps in Amateur Handball Players.Journal of functional morphology and kinesiology · 2025Article
- Physical Demands and Acute Neuromuscular Responses Across a Single-Day 3 × 3 Male Basketball Tournament.Sensors (Basel, Switzerland) · 2025Article
- Investigating Countermovement and Horizontal Jump Asymmetry in Female Football Players: Differences Across Age Categories.Journal of functional morphology and kinesiology · 2025Article
- Asymmetry in college basketball players: change of direction performance in shuffle movement and 505 test.Frontiers in physiology · 2025Article
- An investigation of the reliability, validity, and impact of operator expertise on assessing vertical jump height in collegiate badminton athletes with My Jump Lab.Frontiers in sports and active living · 2025Article
- Advancing Field-Based Vertical Jump Analysis: Markerless Pose Estimation vs. Force Plates.Life (Basel, Switzerland) · 2024Article
- The Validity and Reliability of the My Jump Lab App for the Measurement of Vertical Jump Performance Using Artificial Intelligence.Sensors (Basel, Switzerland) · 2024Article
- Reliability and Accuracy of Portable Devices for Measuring Countermovement Jump Height in Physically Active Adults: A Comparison of Force Platforms, Contact Mats, and Video-Based Software.Life (Basel, Switzerland) · 2024Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The aim of the present study was to analyse the validity and reliability of the newly developed My Jump Lab smartphone app, which includes the option to calculate time to take-off and the reactive strength index modified (RSI_Mod - calculated as jump height divided by time to take-off), in addition to jump height. Twenty-seven postgraduate sport science students attended a single test session and performed three maximal effort countermovement jumps (CMJ) on twin force plates, whilst concurrently being filmed using the app. Results showed no significant differences in jump height between measurement methods (g = 0.00) or RSI_Mod (g = -0.49), although a significant difference was evident for time to take-off (g = 0.68). When a correction factor was applied to time to take-off data, no meaningful differences were evident (g = 0.00), which also had a knock-on effect for RSI_Mod (g = 0.10). Bland-Altman analysis showed near perfect levels of agreement for jump height with a bias estimate of 0.001 m, whilst time to take-off reported a bias estimate of 0.075 s initially and, 0.000 s once the correction factor was applied. For RSI_Mod, bias estimate was initially -0.048, and 0.006 once calculated with the corrected time to take-off data. Pearson's r correlations were: 0.98 for jump height, 0.81 for time to take-off, and 0.85 for RSI_Mod. Based on the findings from the present study, and with the inclusion of the newly embedded correction factor, My Jump Lab can now be used as both a valid and reliable means of measuring time to take-off and RSI_Mod in the CMJ.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.