Difficulty Rating

Very low fitness level

• IBP > 25: hard to very hard

Low fitness level

• IBP 14-25: easy

• IBP 26-38: medium

• IBP 39-50: hard

• IBP >50: very hard

Medium fitness level

• IBP 26-50: easy

• IBP 51-75: medium  

• IBP 76-100: hard

High fitness level

• IBP 51-100: easy