I stumbled onto Dwain Chambers training videos, who was in the gym working on his plyometrics and strength endurance.

The video belows shows of him doing a 62 inch (157cm) box jump.

Well it didn’t stop there and he successfully attempted at 68 inch (172cm) box jump!

Here’s Dwain chamber doing some maximum strength training, performing jump squats with 405 lbs (183kg).

Also take a look at a simple explosive step ups below with dumbbells, that’s very effective in building lateral explosive power in the legs.

Disclaimer: Kids do not try this at home!