@book{3439,
	author = {PT Direct. },
	title = {Principles of exercise. },
	publisher = {PT Direct, },
	year = {c2024. },
	series = {PT Direct : Tools for Personal Training Success },
	address = {[s.l.] },
	url = {https://www.ptdirect.com/training-design/training-fundamentals/the-exercise-principles}
}