If you are wondering “how fit should I be” you could start off with an army fitness standard

Voila

• Full press-ups – a minimum of 44 in two minutes
• Full sit-ups – a minimum of 50 in two minutes
• Static lift onto a platform 1.45m high.
• Jerry can test – carry two 20kg weights over a distance of 120m in two minutes.
• A Beep test with the level of 10.1 (1.5 mile run in 9 minutes 30 seconds).

I think this is the basic standard that  programmes like “SAS who dares wins”, uses.