Extend your hips fully on the top of each jump. Do not go crazy on the height, as this is an endurance exercise.
Make sure your front foot rolls from the toe all the way to the heel as you land.
Instead of clasping your hands behind your neck you may hold your hands in a fighter’s guard.
100 consecutive reps are considered good—but we suggest that you stick to A+A programming most of the time: low reps and short rests.
E.g., start with 3 reps every 30sec and build up to 30min—while passing the talk test before every set.
Then switch to 4 reps every 30sec and repeat the process.
Then 5 reps…
Keep adding reps for as long as you are able to keep passing the talk test and your joints are not complaining.
Do the above 3 times a week.
Every 2 weeks test your consecutive perfect reps in one set. Report your results on the StrongFirst Forum. 
