@churchtexter A few points:
- Military people aren't superhuman, anything physical that is done in the military can be done with civilians, everyone who's entered the military starts as civilians
- There's plenty of video footage of people doing upwards of 50 burpees in a row with no ill effect. No reason to believe that any exercise, at all, is dangerous based on an arbitrary number. It's all based on the ability and limitations of the practitioner.
- Any exercise can lead to injury if done recklessly and with no regard for a person's level of fitness, training experience and overall conditioning.
In the same way, any exercise, regardless of form can be done safely provided a person has built up to it overtime.
The nice thing about being living adaptable creatures is our bodies adjust to whatever stimulus and range of motion is put on them.
As long as the stimulus/ROM that a person is used to, isn't massively exceeded in a very short period of time, injury is never a guarantee.