If you’re short on time and don’t have a lot of kit to hand, this seven-minute dumbbell workout is all you need to build a stronger back and bigger biceps.

“Most of the time 10 to 12 reps will be performed in 30 seconds making it easier to stay on track. This will become second nature once it becomes a healthy habit,” North says. “Note: Focus on ...

Day 2 features a workout session lasting a total of 14 minutes, divided into two segments of 7 minutes each. DISCLAIMER: The ...