Does Weight Training Slow Boxers Down? Probably a little bit

The idea that weight training will slow down has been discussed in boxing circles since at least the 60's and probably before that.

In recent years this idea has become discredited, not entirely sure why as I've never seen a really good conclusive argument.

Meanwhile in the last decade the sport science community have been making strides in their ability to analyse muscle fibers.

They now realise that muscle fibers respond far more to training than previously thought. A number of studies have been carried out that show a gradual decrease in the number of Type IIX ultra fast twitch muscle fibres in response to weight training.

Video here going through the studies;