Depends on the type of excersise , weight training like daz , yeah definatly what he says , tried and tested as any bodybuilding mag will tell you , however tosh and his wife are long distance endurance athletes low carb high fat diets offer a slow burning energy after you have adapted over two weeks and suits this type of training much better , I have done both but 90 days ago decided to try vegan I dropped two weight catagories (I fight) from 82 kg to 62kg without planning to , never felt stronger and can wrestle an hour without stopping , I deadlift 140kg at 62kg body weight , vegan is the new hotness guys I’m telling ye ! :-)
140KG deads at 62kg weight, that's stronger than me when you take into account relative strength.
Its how much you can lift relative to your bodyweight, your doing really well there mate.