The Expendables 3 star, former American football player and all-round MF favorite Terry Crews shares his opinions on how not to conduct yourself in the gym. Which one are you guilty of?

1. Hogging ALL the machines
2. Littering your weights EVERYWHERE
3. Leaving a trail of sweat on all the kit
4. Doing arm curls in the squat rack
5. Using your phone mid-workout

See Crews’s advice for correcting these heinous gym crimes and diet and share with a friend you know is guilty of one of the above. Lesson learned.

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