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Real time estimation of vertical jump height with a markerless motion capture smartphone app: A proof-of-concept case study. I powered My Jump Lab Official with AI to estimate jump height automatically. Validation finally online!!👇🏻

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Carlos Balsalobre

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15,438 просмотров • 2 лет назад •via X (Twitter)

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random nerd movement realization i had yesterday. You can trigger a slide by walking of an edge to cross the 200hu/s required to initiate a slide. This let's you initiate a slide without having to sprint so you can do it out of a backwards walk. You can also do this with a jump-slide. But this "new" method let's you do it without a jump. Realization: This prevents jump fatigue so it let's you "slidejump" backwards but at full jump height. Not revolutionary or anything. Just a little thing i realized and thought was kinda neat🙃
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random nerd movement realization i had yesterday. You can trigger a slide by walking of an edge to cross the 200hu/s required to initiate a slide. This let's you initiate a slide without having to sprint so you can do it out of a backwards walk. You can also do this with a jump-slide. But this "new" method let's you do it without a jump. Realization: This prevents jump fatigue so it let's you "slidejump" backwards but at full jump height. Not revolutionary or anything. Just a little thing i realized and thought was kinda neat🙃

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🚨NEW PAPER🚨 Validity of My Jump Lab Official for the real time measurement of barbell velocity 🏋️📱 With the boss Chris Bishop in Journal of Strength and Conditioning Research r>0.90 and similar levels of reliability than GymAware📈🔎 Validated VBT just with the iPhone camera, thanks to AI🤖
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🚨NEW PAPER🚨 Validity of My Jump Lab Official for the real time measurement of barbell velocity 🏋️📱 With the boss Chris Bishop in Journal of Strength and Conditioning Research r>0.90 and similar levels of reliability than GymAware📈🔎 Validated VBT just with the iPhone camera, thanks to AI🤖

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𝘾𝙈𝙅 𝙖𝙣𝙙 𝙛𝙖𝙩𝙞𝙜𝙪𝙚 𝙢𝙤𝙣𝙞𝙩𝙤𝙧𝙞𝙣𝙜, 𝙬𝙝𝙚𝙣 𝙅𝙪𝙢𝙥 𝙃𝙚𝙞𝙜𝙝𝙩 (𝙘𝙢) 𝙖𝙡𝙤𝙣𝙚 𝙞𝙨 𝙣𝙤𝙩 𝙩𝙝𝙚 𝙗𝙚𝙨𝙩 𝙢𝙚𝙩𝙧𝙞𝙘 𝙩𝙤 𝙙𝙚𝙩𝙚𝙘𝙩 𝙣𝙚𝙪𝙧𝙤𝙢𝙪𝙨𝙘𝙪𝙡𝙖𝙧 𝙛𝙖𝙩𝙞𝙜𝙪𝙚 𝙞𝙣 𝙤𝙪𝙧 𝙖𝙩𝙝𝙡𝙚𝙩𝙚𝙨 👇🏼 1️⃣Jump Height and fatigue ? Not clear evidence …. Cormack et al. observed altered flight time to contraction time ratio up to 2 days after elite competition “despite little changes in jump height performance” Different movement solutions occur to maintain a desired “performance” metric such as jump height or power output Legg et al. suggested that altering CMJ mechanics assisted with maintenance of jump height while in a fatigued state, with changes in dip magnitude observed midseason despite no change in jump height. 2️⃣RSI-mod as an alternative variable ?? CMJ height alone may not always discriminate between rugby league cohorts, emphasizing the requirement for the associated underpinning force-time variables [to indicate jump ‘strategy’], or RSImod at the very least McMahon et al. reported that a group of combined professional senior SL and RLC rugby league players who performed the CMJ with a “higher RSImod” demonstrated higher force, velocity and thus power outputs. 3️⃣Sensitive to change of different metrics , Jump Height 🆚 RSI-mod? CMJ height was not sensitive to change in neuromuscular status of elite Australian Rules Football athletes pre- to post-match, from 48-hours pre- to 48-hours post-match 📌Conclusions - RSImod or FT:CT may prove more useful overall as an indicator of readiness, slow SSC activity, and neuromuscular fatigue as they impact the coordinative strategy and jumping performance. - A decline of 8% in FT:CT or RSImod would indicate a change requiring intervention as at this level of neuromuscular fatigue there are considerable changes to performance 📚 📕Hughes, S., Warmenhoven, J., Haff, G. G., Chapman, D. W., & Nimphius, S. (2022). Countermovement jump and squat jump force-time curve analysis in control and fatigue conditions. The Journal of Strength & Conditioning Research, 36(10), 2752-2761. 📗McMahon, J. J., Jones, P. A., & Comfort, P. (2022). Comparison of countermovement jump–derived reactive strength index modified and underpinning force-time variables between super league and championship rugby league players. The Journal of Strength & Conditioning Research, 36(1), 226-231. 📘Martinez, D. B. (2016). THE USE OF REACTIVE STRENGTH INDEX, REACTIVE STRENGTH INDEX MODIFIED, AND FLIGHT TIME: CONTRACTION TIME AS MONITORING TOOLS. Journal of Australian Strength & Conditioning, 24(5) 📘Bishop, C., Jordan, M., Torres-Ronda, L., Loturco, I., Harry, J., Virgile, A., ... & Comfort, P. (2023). Selecting metrics that matter: comparing the use of the countermovement jump for performance profiling, neuromuscular fatigue monitoring, and injury rehabilitation testing. Strength & Conditioning Journal, 45(5), 545-553.
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𝘾𝙈𝙅 𝙖𝙣𝙙 𝙛𝙖𝙩𝙞𝙜𝙪𝙚 𝙢𝙤𝙣𝙞𝙩𝙤𝙧𝙞𝙣𝙜, 𝙬𝙝𝙚𝙣 𝙅𝙪𝙢𝙥 𝙃𝙚𝙞𝙜𝙝𝙩 (𝙘𝙢) 𝙖𝙡𝙤𝙣𝙚 𝙞𝙨 𝙣𝙤𝙩 𝙩𝙝𝙚 𝙗𝙚𝙨𝙩 𝙢𝙚𝙩𝙧𝙞𝙘 𝙩𝙤 𝙙𝙚𝙩𝙚𝙘𝙩 𝙣𝙚𝙪𝙧𝙤𝙢𝙪𝙨𝙘𝙪𝙡𝙖𝙧 𝙛𝙖𝙩𝙞𝙜𝙪𝙚 𝙞𝙣 𝙤𝙪𝙧 𝙖𝙩𝙝𝙡𝙚𝙩𝙚𝙨 👇🏼 1️⃣Jump Height and fatigue ? Not clear evidence …. Cormack et al. observed altered flight time to contraction time ratio up to 2 days after elite competition “despite little changes in jump height performance” Different movement solutions occur to maintain a desired “performance” metric such as jump height or power output Legg et al. suggested that altering CMJ mechanics assisted with maintenance of jump height while in a fatigued state, with changes in dip magnitude observed midseason despite no change in jump height. 2️⃣RSI-mod as an alternative variable ?? CMJ height alone may not always discriminate between rugby league cohorts, emphasizing the requirement for the associated underpinning force-time variables [to indicate jump ‘strategy’], or RSImod at the very least McMahon et al. reported that a group of combined professional senior SL and RLC rugby league players who performed the CMJ with a “higher RSImod” demonstrated higher force, velocity and thus power outputs. 3️⃣Sensitive to change of different metrics , Jump Height 🆚 RSI-mod? CMJ height was not sensitive to change in neuromuscular status of elite Australian Rules Football athletes pre- to post-match, from 48-hours pre- to 48-hours post-match 📌Conclusions - RSImod or FT:CT may prove more useful overall as an indicator of readiness, slow SSC activity, and neuromuscular fatigue as they impact the coordinative strategy and jumping performance. - A decline of 8% in FT:CT or RSImod would indicate a change requiring intervention as at this level of neuromuscular fatigue there are considerable changes to performance 📚 📕Hughes, S., Warmenhoven, J., Haff, G. G., Chapman, D. W., & Nimphius, S. (2022). Countermovement jump and squat jump force-time curve analysis in control and fatigue conditions. The Journal of Strength & Conditioning Research, 36(10), 2752-2761. 📗McMahon, J. J., Jones, P. A., & Comfort, P. (2022). Comparison of countermovement jump–derived reactive strength index modified and underpinning force-time variables between super league and championship rugby league players. The Journal of Strength & Conditioning Research, 36(1), 226-231. 📘Martinez, D. B. (2016). THE USE OF REACTIVE STRENGTH INDEX, REACTIVE STRENGTH INDEX MODIFIED, AND FLIGHT TIME: CONTRACTION TIME AS MONITORING TOOLS. Journal of Australian Strength & Conditioning, 24(5) 📘Bishop, C., Jordan, M., Torres-Ronda, L., Loturco, I., Harry, J., Virgile, A., ... & Comfort, P. (2023). Selecting metrics that matter: comparing the use of the countermovement jump for performance profiling, neuromuscular fatigue monitoring, and injury rehabilitation testing. Strength & Conditioning Journal, 45(5), 545-553.

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A real-time AI motion capture model with 1B parameters. Connects to a 1080P camera or processes uploaded video to generate 3D motion data in real time. Supports Unreal Engine, Unity, and Blender, requiring 8GB of GPU VRAM for real-time processing.
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A real-time AI motion capture model with 1B parameters. Connects to a 1080P camera or processes uploaded video to generate 3D motion data in real time. Supports Unreal Engine, Unity, and Blender, requiring 8GB of GPU VRAM for real-time processing.

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Day 1 of VibeJam for me → Lots of 3D games already → Deciding to go 2D this year → Using Phaser 4 (!) → Codex + GPT 5.4 I always start off with a test 'gym' → Get main movement working 🏃 → Tweak values (jump height, run speed) 🔧 → Add as much debug as possible 🐞

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💫New name and new features DSPyground now features a real time view of the hill climbing GEPA does along with all the prompts it tries as it optimizes. Also, a reorganized UI with light/dark mode toggles. Real time Prompt E̶n̶g̶i̶n̶e̶e̶r̶i̶n̶g̶Optimization powered by DSPy GEPA and AI SDK What else do you need? 👇Jump into the repo and let me know.

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Eccentric duration during CMJ as a metric for monitoring and detecting neuromuscular fatigue 24-48h 🪫post game ? 🚨Jump Height ?? The main finding of the study was that during the late regeneration phase (48 hours post-baseline), fatigued players may select a movement strategy to accomplish the output driven goal of jumping for height. ⬇️⏱️Ecc duration ?? The changes displayed in the time related variables (⬆️EccDur, ConDur and TotDur), in conjunction with a return to baseline for JH at 48 hours post- baseline, suggests that an alternative movement strategy was adopted to complete the task, albeit in a mechanical inefficient manner 📚 Kennedy, R., & Drake, D. (2017). The effect of acute fatigue on countermovement jump performance in rugby union players during preseason. Journal of Sports Medicine and Physical Fitness, 57(10), 1261-1266.
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Eccentric duration during CMJ as a metric for monitoring and detecting neuromuscular fatigue 24-48h 🪫post game ? 🚨Jump Height ?? The main finding of the study was that during the late regeneration phase (48 hours post-baseline), fatigued players may select a movement strategy to accomplish the output driven goal of jumping for height. ⬇️⏱️Ecc duration ?? The changes displayed in the time related variables (⬆️EccDur, ConDur and TotDur), in conjunction with a return to baseline for JH at 48 hours post- baseline, suggests that an alternative movement strategy was adopted to complete the task, albeit in a mechanical inefficient manner 📚 Kennedy, R., & Drake, D. (2017). The effect of acute fatigue on countermovement jump performance in rugby union players during preseason. Journal of Sports Medicine and Physical Fitness, 57(10), 1261-1266.

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In today’s episode of #PhysEd Arts & Crafts, I made a mono rope! An old jump rope, some PVC conduit, a couple adapters and this thing is good to go! Working with a teacher who has a student with one hand and will be kicking off a jump rope unit in the new year. #adaptedpe

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I mean, is that even a question?! The excitement is REAL, and we’re gearing up for something huge with $FNTIO! 🚀 With all the anticipation surrounding the launch, it’s time to lock in and get ready to be part of the next big thing in crypto. Are you ready to jump in?💸

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I was terrified to jump out of the car. I was the only white face and it was a very poor area. I’d been warned not to. A girl I was with called Anisha burst through the men and filmed them. With her bravery I decided to follow (3/8)

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I posted a video of Kobe making fun of LeBron and KD for jumping ships … Here’s a video of MJ showing no respect to LeBron … The real OG’s don’t respect LeBron or KD LeBron started the ship jumping in his prime, then KD followed… It was cool to jump ships towards the end of your career, but to jump ships in your prime to go play with a superstar wasn’t allowed back then. LeBron and KD have their own table.. The ship jumpers table …. Lebron doesn’t have a sit at Kobe’s and Jordan’s table. FOH

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Did anyone spot who Bebe Cool was vibing with Day 1 of his UK media tour? That guy in the black tee? Yep that’s DJ TUNEZ , the official DJ for Wiz Kid Now the real question is… what are they cooking up? Could it be a track? A collab? Is Wiz Kid about to jump on a song with Uganda’s BigSize? We’re watching closely… #BreakTheChainsAlbum

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