Commando Steve Willis can strike fear into the heart of the most focused contestant on .
He spent 10 years in the army, including time with special forces and the counter terrorism unit. He is now a personal trainer specialising in Cross Fit.
The Biggest Loser trainer, Commando Steve Willis.Credit: Sarah McInerney
Last year he came fourth in the Cross Fit Games after spending two gruelling days running with sandbags and swinging 32 kg kettlebells. In July he'll compete again and has his eye on the No. 1 spot.
When he is not working on he works as a personal trainer and runs his own gym. He is also a family man and married with two children.
Commando Steve spent a few hours in the Fairfax office answering your weight loss and fitness questions. Check below for his tips and guidance.
Comments are provided by Steve Willis as general information only. Comments should not be relied on as health advice or recommendations. Please consult your health professional for independent advice.