INSEP | 27.03.2019
UE7 - Accompagnement scientifique à la Performance
Mathieu Lacome | @mathlacome
Level 1 variables
Problem: Team sports are not played at constant velocity
Accelerations, Decelerations, CODs
* Accelerations are not provided by the accelerometers
small comment on PlayerLoad vs Accel Rate ?
Repetition volume
no: of sets x no. of reps
Absolute volume load
no: of sets x no. of reps. x weight lifted (kg)
Volume load relative to 1RM
no. of sets x no. of reps x % 1RM
Volume load relative to specific RM
no:of sets x no. of reps x % RM for RR used
see - Foster et al. (1995) | borg et al (1982).
Why monitoring training load is important - some case studies
Lacome et al. (2019)
"SSGs are not a one size fits all training weapon when it comes to players loading. Planning position-specific unloading strategies or top-up exercises are likely required to equilibrate players loading relative to game demands when using SSGs".
Lacome et al. (2018)
R2
Strength
Endurance
Speed
Rc
Off
Game
Lacome et al. (2018)
GS: Game simulation: w/ goal keepers
PO: Possession: wo/ goal keepers
McLean et al. 2010
HRex is a promising tool to monitor positive aerobic-oriented training adaptations (Buchheitetal.,2012), with a greater ability to predict changes within the first months of a training program (Scharhag- Rosenbergeretal.,2009)
Text
Buchheit (2014)
Differences in:
Larger effect on players’ locomotor activity than changes in their fitness status per se
Issues
International breaks
Type 1 error
« False positives»
High ratio but player is not injured
"We demonstrate that causal conclusions about the ACWR-injury relationship are prone to confounding from schedule."
Figure 2 — Importance of load variable to artificial neural-network model by each individual player. Abbreviation: HSR, high-speed running.
Total distance (TD, m)
High-speed distance (>14.4 km.h-1, m)
Very-high speed distance (>19.8 km.h-1, m)
Velocity load (vL, a.u)
Force load (fL, a.u)
Mechanical work (MechW, a.u)
Heart rate (bpm)
Multiple stepwise bidirectional regression for each player
A virer + loin
With a standardised drill - used with velocity load (or TD.min-1)
Neuromuscular efficiency ("freshness")
https://public.tableau.com/profile/mathlacome#!/vizhome/Disbalances-Analysis/Tableaudebord1
Vertical stiffness (K) is substancially decreased with neuromuscular fatigue
https://hiitscience.com/hiit-course?afmc=31
-20% - Code: INSEP