Three vital weight loss rules: Essential tips from Kate Beckinsale’s personal trainer

Focus on recovery-sleep as well as active recovery

Gunnar said: “Don’t sleep on sleep.

“Sometimes the extra hour in bed will serve you exponentially more than the extra hour in the gym. Sometimes, not always…”

Studies have also found sleep can boost weight loss.

A study found dieters who stopped sleeping well lost 55 percent less fat over a 14-day period, even though they ate the same calories.