The 10-minute abs circuit to fine-tune your six-pack

Many guys train their asses (as well as other parts) off to get in shape for summer, only to find themselves slacking off once the season starts.

Soon the six-pack becomes a four-pack, which then morphs into one rotund ab. Panic sets in, and suddenly a month’s worth of two-a-days seems the way to go. But it doesn’t have to be that way—you can scale back without destroying your physique if you:

A) Eat clean 85-95% of the time, and keep your body fat at 10% or lower.

B) Avoid boozing like Belushi in Animal House.

C) Train your body hard two or—preferably—three days a week, and throw in a 10- to 15-minute body-part finisher after each session.

To get your beach-worthy abs, crush this two-round circuit routine. Rest a minute before Round 2.