Strech until it starts burning then ease up
Since someone would be performing wind sprint activities, it is guaranteed when performing any activity is to get better overtime so I would say to "work above your target heart rate"
You’re probably being too nice or laugh too much with them. Makes people assume that
1- Separating the Egg Whites
2- Beating Foamy Egg Whites
3- Whipping Soft and Hard Peaks
