Short, intense workouts can produce a 50 per cent improvement in muscle tone.

However, they said that his mobility was gradually improving as he continued to gain muscle tone.

Some bel canto tenors would be past their prime at 40 - those high notes fading out of reach as muscle tone and breath capacity decline.

Yet somehow she has maintained a healthy glow and good muscle tone.

I am also starting to exercise to increase muscle tone - not heavy, but 20 minutes each day.