try Yoga, streching your hamstrings and tummy muscles. (for a warm up) then go for a gentle jog/run round the block every so often. Also, statisticaly, the top 3 excersises to lose weight are:
1)...
I think an appropriate gift you could give a male business client would be a gold money clip. These make great gifts for business associates. You can find some professional and classy gold money...