Wednesday, 7 March 2007

Fat Loss Through Weight Training


Many people think that to lose fat they need to go on a restricted calorie diet and perform hour upon hour of cardio. Calorie controlled diets are virtually certain to backfire: they generally result in a loss of lean muscle tissue which leads to a corresponding drop in metabolic rate. Eventually progress with the weight loss plateaus until there is another drop in calories and a further reduction in metabolic rate. From here there are generally two options: continue the progressive calorie restriction (ultimately leading to anorexia and cachexia, or severe muscle wasting) or return to normal eating and put on even more weight than you lost due to the reduction in metabolically active muscle.

Aerobic exercise may help to shed even more calories but it does not effect major changes to body composition and metabolic rate. Cardio is ideal for health (the 30 minutes per day of exercise equivalent to brisk walking recommended by the ACSM) or sports-specific training, but weight training is superior for lasting fat loss and changes to body composition.

Not only can muscular hypertrophy lead to a better physique and the burning of significantly more calories at rest, but there are even protocols for training with moderate weights (65-75% of 1 rep max) that will generate high levels of blood lactate with a corresponding high production of growth hormone (which burns fat whilst stimulatin glean tissue growth).

For maximum fat burning it is essential to produce high levels of lactic acid by extending sets and increasing time under tension (through relatively high reps, say 10-15). It is helpful to pair exercises using super or compound sets and to reduce rest intervals (generally to between 45 and 65 seconds; sometimes as low as 30 seconds). This "incomplete" recovery contributes to the elevated lactate levels and growth hormone response.

Diet also has its part to play but not by excessively reducing calories. Generally the ratios of macronutrients need to be manipulated in favour of higher protein and lower carbohydrate (but not to the levels suggested by Atkins). Low GI complex carbs should be the principal form of carbohydrates. The level of carbohydrates decided upon will be dependant upon carb tolerance, energy levels, and activity. The only exception to the low GI rule should be the post workout (within 15 minutes) meal.

For more information on losing fat through weight training contact Derek at fishfitness@tiscali.co.uk

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