TABLE 4.

Relationship between slow-twitch muscle fiber percentage and multiple traits

Factor	P value
	All participants (n = 164)	Endurance athletes (n = 51)	All power athletes (n = 48)	All controls (n = 65)
Age	0.0001*	0.019*	0.529	0.0002*
Sex	0.0033#	0.515	0.245	0.018#
Training frequency	-	0.042*	0.038*	-
Training age	-	0.538	0.045*	-
Level of competition	-	0.034*	0.555	-
Reaction time	0.094	0.786	0.235	0.026#
Self-reported tolerance to LD	0.0002*	0.219	0.629	0.421
Self-reported sprinting ability	0.30	0.324	0.853	0.756
Height	0.099	0.118	0.939	0.993
Weight	0.754	0.862	0.948	0.766
BMI	0.657	0.994	0.973	0.877
Chest depth	0.023*	0.03*	0.145	0.609
Systolic BP	0.042#	0.825	0.358	0.005#
Diastolic BP	0.141	0.896	0.045#	0.406
Resting HR	0.0067#	0.163	0.118	0.284
Fracture incidence	0.021*	0.074	0.09	0.443

^*P < 0.05, positive relationship between STMF% and a variable adjusted for covariates (where appropriate: sex, age, training frequency, type of training, BMI);

^#P < 0.05, negative relationship between STMF% and a variable adjusted for covariates (where appropriate: sex, age, training frequency, type of training, BMI). LD, long distances