| how can i rapidly improve my fitness?
hi, im 23, not overweight (actually a bit skinny), non smoker.just had a full medical and heart, bp etc. are perfectly normal. but ive never done regular exercise in my life.i'm determined to get fit, but right now i cant run for more than about minute without a break.and 70 year old dudes were overtaking me today and its embarassing.whats the best way to build my fitness level quickly but without exhausting myself?
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