Protecting Muscle During Cardio

Nutrition
1

I start to do some kick boxing, and i realized that intensity is pretty high, im a bit worried about burning muscle. i was thinking on a good shake to take during the kick boxing class.
For example:

50g vitargo
10g amino acids
5g glutamine
500ml of cold watter

Feel free to share your opinion and your experiences.

thank you for your attention

2

Plazma, Surge Workout Fuel (before/during)/MAG-10(after), Surge Recovery (serving is spit in three before/during/after).

In that order of preference.

I used to use Extend during with a good meal after (Your overall diet will dictate the amount of energy you have during your work out if you go this way).