Mostly they require tight fitting clothing so they can see that your muscles are working properly and so on.
1	Mostly	mostly	ADV	RB	Degree=Pos	3	advmod	3:advmod	Discourse=joint-other_m:67->65:1
2	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	3:nsubj	Entity=(74-organization-giv:inact-cf1-1-ana)
3	require	require	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
4	tight	tight	ADJ	JJ	Degree=Pos	6	amod	6:amod	Entity=(82-object-new-cf4-3-sgl
5	fitting	fitting	ADJ	JJ	Degree=Pos	6	amod	6:amod	_
6	clothing	clothing	NOUN	NN	Number=Sing	3	obj	3:obj	Entity=82)
7	so	so	SCONJ	IN	_	10	mark	10:mark	Discourse=purpose-goal:68->67:0
8	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	10	nsubj	10:nsubj	Entity=(74-organization-giv:act-cf1-1-ana)
9	can	can	AUX	MD	VerbForm=Fin	10	aux	10:aux	_
10	see	see	VERB	VB	VerbForm=Inf	3	advcl	3:advcl:so	_
11	that	that	SCONJ	IN	_	15	mark	15:mark	_
12	your	your	PRON	PRP$	Case=Gen|Number=Sing|Person=2|Poss=Yes|PronType=Prs	13	nmod:poss	13:nmod:poss	Entity=(27-object-giv:inact-cf3-2-coref(17-person-giv:inact-cf2-1-ana)
13	muscles	muscle	NOUN	NNS	Number=Plur	15	nsubj	15:nsubj	Entity=27)
14	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	15	aux	15:aux	_
15	working	work	VERB	VBG	Tense=Pres|VerbForm=Part	10	ccomp	10:ccomp	_
16	properly	properly	ADV	RB	Degree=Pos	15	advmod	15:advmod	_
17	and	and	CCONJ	CC	_	19	cc	19:cc	_
18	so	so	ADV	RB	_	19	advmod	19:advmod	_
19	on	on	ADV	RB	Degree=Pos	15	conj	10:ccomp|15:conj:and	SpaceAfter=No
20	.	.	PUNCT	.	_	3	punct	3:punct	_
