Furr points out that for many individuals, torching 1,000 calories may require a combination of exercises and physical activity scattered throughout the day rather than one long, intense workout.

It's generally accepted that exercise is a key element of losing ... shows that daily energy expenditure can vary by more than 1,000 calories per day in a group of older people.

He is a Fellow of The Physiological Society and the British Association of Sport and Exercise Sciences ... expenditure can vary by more than 1,000 calories per day in a group of older people.