So you've gone from being sat on your arse in the car puffing on a tab to cycling, swimming and going to the gym?
Well, kudos to you! Seriously, I take my hat of to you!
However, I fear that you are falling into the trap that most of us who have reached a certain age have fallen into; and that is being too enthusiastic and trying to do too much at once.
Effective and safe fitness training is built on three things: exercise, nutrition & rest. From what you have written it is clear that you are doing too much of the former and not enough of the latter. If you carry on as you are, you are at risk of over-training which will lead to injury and a lack of progress. In turn this will likely demoralise you and before you know it you'll give the whole lot up and be back in your old, bad ways.
Firstly, go and see your Doctor and get an "M.O.T.": you need to know where you're at before you start. If you have any underlying health problems they will likely be exacerbated by exercise.
Secondly, going from a sedentary lifestyle to the amounts of exercise you are doing is far too much. Cycling and swimming are both aerobic activities (working the heart and lungs) so, at least until you have a reasonable standard of fitness, it should be one or the other and not both (on the same day). Variety in exercise is good: it relieves boredom and works your body in different ways, so if you cycle on a particular day don't also cycle.
Running is a very effective aerobic exercise to burn calories and shift weight: have a look at this
training programme; what particularly like about this, is that it is aimed directly at people starting from a low level of fitness and is very gradual. But again, it should be one or the other, not both!
Resistance training (hefting weights in the gym) is good to include in your programme; once we pass forty the rate at which calcium leaches from our bones accelerates: aerobic exercise doesn't address this, weight-bearing exercise does. But again, don't over do it: a full body workout once or twice a week is plenty. Gym fascists who boast of hitting the gym every day are either i) doing a split programme that targets different areas of the body on different days or ii) ill-informed idiots.
Thirdly, you need to know how many calories you need on a daily basis if you're to adjust your diet to lose weight; try this
weight calculator to get a
broad idea of your target weight and this
calorie calculator to establish your needs. Do two calculations, one using your current weight and one using your target weight.
To begin with I suggest you start checking your current diet so you know if you are over-eating (gaining weight) and if necessary adjust your diet to maintain your current weight. After a month or so
gradually reduce your calorie intake in stages allowing your body time to adjust to each reduction, until you are at the right level to maintain your target weight.
Eat more, smaller meals to stop your metabolism in a steady state rather peaking and troughing: have a snack three hours after a meal and a meal two and a half hours after a snack (three of each should see you through the day); Breakfast should be larger than Lunch which should be larger than Dinner. This will stop more fat being laid down and avoid you feeling hungry.
Finally, you need to rest your body. Most people who take up exercise also have an idea of diet & nutrition, but most will neglect to rest enough. Exercise provides the stimulus, nutrition provides the fuel, rest provides the opportunity. You are
definitely doing too much at the moment: your commute is taking you longer and you have picked-up an injury, I rest my case...
From what you've written I suggest that you should be exercising no more than every other day, with weekends off, ie three times a week. For example cycle to work on Monday, go to the gym on Wednesday and swim on Friday. After a month/six weeks you might like to add a weekend bike ride into the mix or maybe cycle on Fridays to and swim at the weekend.
If I only impress one thing upon you, it is that you need to take it slow: it took you forty-four years to get to where you are now, you can't change that overnight! For a truly inspirational read I suggest you check-out
gb155.
Best regards,
Jim.