weight before and after exercise

schmoozie26
schmoozie26 Posts: 63 Member
edited January 27 in Fitness and Exercise
I was curious as to why you actually lose weight from before a workout to after. I know that I've dropped before, but this morning it was a full lb......and all I did was a walk outside for 45 minutes? Seemed like a lot to me. Anyone else have this happen?????

Replies

  • BrianSharpe
    BrianSharpe Posts: 9,248 Member
    As you exercise, even at lower intensities like walking, you perspire - the perspiration evaporates and, if you don't replenish your fluid levels, you will experience a temporary drop in weight.

    Weighing yourself before and after exercise has been a longstanding method for endurance athletes to ensure they're adequately re-hydrating while working out. If memory serves me correctly the old rule of thumb was that you didn't want to lose more than about 2% of your body weight otherwise you were at risk of becoming dehydrated.
  • schmoozie26
    schmoozie26 Posts: 63 Member
    Interesting.....I knew I always had a difference, but do not think I ever saw a pound, even when I was exercising harder.
  • Tiznonay
    Tiznonay Posts: 124 Member
    yeah, its all just sweat weight. I can run for an hour and weigh 3 or 4 lbs less than I did at the start. I know its not actual fat loss, but its still feels kind of rewarding. And I love instant results!
  • moondawg14
    moondawg14 Posts: 249 Member
    You're also exhaling moisture.... one of the reasons you lose weight overnight.

    I think I "lost" 5 or 6 pounds during my first half-marathon. (my body weight was around 200 at the time)

    I sweat like a freaking monster, though.
  • MsEndomorph
    MsEndomorph Posts: 604 Member
    I lose weight after cardio and gain it after lifting. I find it better to just stay away from the bloody scale or my OCD comes out full force.
  • phjorg1
    phjorg1 Posts: 642 Member
    do people seriously do this?

    Weight yourself before and after you drink a glass of water. Be careful though, such a dramatic increase in body weight might ruin whole whole day...

    p.s. you sweat when you work out. sweat is water. water has weight.
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