DurhamCC

Overview

This report provides a brief overview force testing performance across the squad.Counter movement jump

Jump testing

Counter-movement jump

These tests provides an estimate of a players ability to apply lower limb impulse. Counter-movement jump height has been presented as a measure of maximal lower limb impulse whilst RSI modified also considers the time taken to jump by adjusting counter-movement jump height for differnt contraction times. A high RSI represents a jump that is both fast and high.

10-5 repeated jump test

This test provides an estimate of a players’ reactive strength, the reactive strength index (RSI) is a way of representing repeated jump height of the best 5 jumps whilst controlling for differences in contact time and presented in meters per second. As a general rule RSI values of ~2 m/s would be deemed good¹, although work is needed to provide more robust normative data.

Profiling players based upon their repeated jump and counter-movement jump performance may be useful for programming¹.

Durham CCC squad average jump data
CMJ height (cm)	CMJ depth (cm)	CMJ time (s)	RSImod (m/s)	10/5 RSI	SL left (cm)	SL right (cm)
33.9 ± 5	-30.7 ± 6.7	705.2 ± 92.7	0.5 ± 0.1	1.6 ± 0.3	16.2 ± 2.4	16 ± 2.3

Squad data: counter-movement jump

Squad ranking: counter-movement jump

Counter-movement jump metrics

10/5 jump measures

Single leg counter-movement jump

Isometric Strength

Force frame

Here I have reported maximum force from the force frame tests (we found high correlations between maximum and average force here). The force frame has recorded maximum isometric shoulder external and internal rotation for left and right limb and maximum ankle inversion and eversion force. They are reported in Newtons of force.

Summary statistics

Force frame data (mean ± SD)
R Shoulder ER	L Shoulder ER	R Shoulder IR	L Shoulder IR	R Ankle IV	L Ankle IV	R Ankle EV	L Ankle EV
161 ± 23.2	147 ± 26.6	153 ± 26	146 ± 31.1	159 ± 25.3	162 ± 30.1	153 ± 32.1	150 ± 34.2

Squad overview

Squad rank

Squad data

Hamstring strength

This test provides an overview of hamstring strength which could be important for sprinting movements. Poor hamstring strength is one risk factor for hamstring injuries. It is recommended that elite players apply a minimum of ~350 N each leg (although data is limited on elite cricket players). It is normal to have a dominant limb so some asymmetry is to be expected but larger differences between limbs maybe be worthy of further investigation.

Summary data

Mean ± SD
Test	Left	Right	Max
ISO Prone	322.4 ± 55.4	323.6 ± 66.8	323 ± 58.9
Nordic	369.5 ± 56.2	374.8 ± 67.8	372.1 ± 60.6

Squad rank: Isometric hamstring

Squad rank: Nordic

Raw data

Note, values represent the maximum force through the reps and asymmetry refers to the percentage imbalance in force between right and left leg.

Isometric mid-thigh pull (IMTP)

Note: I have reported peak force, both absolute and relative. Other variables such as rate of force development and impulse at 100 ms / 200 ms may be of interest but are notably noise metrics - if you want to use these it might be worth taking some time to review the individual force times curves first to ensure you are happy with the quality of the trace before computation.

IMTP force (nean ± SD)
Rel_peak_froce	Peak_force
33.6 ± 5.2	2978.7 ± 467.6

Squad data: IMTP

Squad rank: IMTP

Ash test

Ash test dominant limb force in Newtons (mean ± SD)
force_180	force_135	force_90
163.7 ± 33.5	151.4 ± 30.5	133.2 ± 29.5