Ready to become a WH&F warrior? Join our free four week summer body challenge! WH&F have teamed up with September cover model and trainer Sheena-Lauren to create a challenge designed to get you in your best physical and mental shape for summer and beyond. The 28-day program, which you can find in the December issue of WH&F will boost your metabolism, blast fat , tone and accentuate YOUR unique shape while bathing your brain in endorphins and other 'hell yeah, I can' chemicals. HOW IT WORKS... Each of the four weeks will be made up of different workouts with different goals. We encourage you to look thoroughly at each workout along with the demonstration pictures below. You will find further workout details for each week on Facebook and on our website . Because we're all time poor, the challenge has been configured with forgiving tweaks and hacks that let you work it with your schedule. Based on six 30-minute high-intensity workouts a week , it requires next...