Hi Carrottop.xo, It took me a couple of weeks before i could really do any exercise i kept feeling light headed even walking the dog was an effort.
But then i seemed to have an abundance of energy lets keep it real 600 cals a day on TS can't run a marathon i was doing about 30 mins a day nothing to strenuous walking the dog slow jogging or some days just cleaning the house. If you stick to TS 100% it will work but the first week for me was hard.
I used Exante TS only for 6 weeks to give me a big kick up the bum and lose some weight quickly to enable me to start jogging/running again.
I've now lost just over 2 stone and still losing, now i'm back on normal food and finding it a lot easier and enjoyable to go running.
Good luck on your journey,