Body Weight

aka calisthenics - Exercise using your own body's weight as resistance

Sit Up, Push Up, Squat, etc.

no machines, not Aerobic Exercise

"Fitness Newbie? Try This Bodyweight Workout for Beginners" https://greatist.com/fitness/bodyweight-workout-for-beginners

can be done Super Slow

http://www.humananatura.org/naturalexercise8.php

http://noisebetweenstations.com/personal/weblogs/?p=2059#comment-216073

scans of old FarmerBurns workout book. Or buy the reprint from Matt Furey

May'2013: a 7-minute workout of Interval Training workout: 12 exercises, 30sec each with 10sec rest between.

• http://en.wikipedia.org/wiki/Interval_training
• 2015: 7-minute Super Hero workout https://www.sixtostart.com/superhero-workout/