Hi could someone give me advice about coming back to riding after an absence of 10 years I used to ride about 150 miles a week when I was 40 years old.

I have tried several times to ride but have suffered overtraining symptoms. Even after riding for only 30 mins or so.

Heavy Legs cramps and tiredness.

When I was fit I could ride 60 miles in a hour and a half.

Any advice will be recieved gratefully.