Is Diet Soda Useful In Cardio?

[JUICESEEKER]

When i drink diet pepsi or diet coke before a cardio session, i seem to get some kind of energy even though the label says 0 carbs, 0 fat, 0 calories. I was wondering if it is useful at all for cardio?

 

[ripper911]

it has 50mg of caffeine

 

[crmdogg]

using caffeine allows your body to tap into its fat stores easilier, so i suppose it is good to drink before cardio, just like coffee is