Our expert says:
It's not a very accessible sport, and I think that's the reason. The problem for the general guy who wants to get fit is that they don't have access to squash courts unless they join a club, and if you don't have the incentive (like a friend who is a member) then you will tend to find other forms of training. There's also a cost factor associated with it, but that's relatively minor if you consider that people spend money on gym memberships. To me, squash's problem is its inaccessibility - you're lucky to have access, but there are 10 who don't for every 1 who does.
As for your question, I'd say yes, if you could add sessions per week, it will help. I don't think you should make each one longer just yet, that may come later. But there's some research that has shown that the frequency of training is the main predictor of successful fat burning and weight loss. So four is better than three, five is better still. So if you can find another day or two it would help - doesn't need to be squash either. A jog, or a gym session, just for the variety would help. You'd also get fitter for squash, which would help your enjoyment levels more.
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