Great suggestion Elliot. Chocolate Yerba Matte (4 calories) is delicious and tastes a lot like a mocha w/o the fat and sugar.

Greetings mewill2! When I find myself feeling fatigued versus energized during and after a workout, it is often a matter of not having enough (or the right kind of) fuel to get me through a workout, or not having timed my fueling well enough. Something to consider.

I liken my food intake pre-, during and post-workout to a Gas Gauge on a car, and work hard to make sure I'm not trying to exercise ... on fumes.

Have you evaluated how well you are eating at the meal prior to the workout, to appropriately fuel your workout? And consider moving the timing of your day's calories to include an energizing snack immediately prior and/or during your workout. Making such adjustments made a tremendous difference for me. 

I just started back into working out a year ago. When I recently started running, I began feeling fatigued, versus energized. Now that I eat a balanced meal at least two hours prior, add a bit of fuel immediately before my workout, and a bit during, I can remain energized during and afterwards, even when running 2-7 miles.  (The exceptions: When I push myself too hard and work the same muscle groups by running too many days in a row, and when I just didn't get enough sleep.)    "Sports Nutrition" is the research category I've found helpful online and at libraries.

I read you had concerns that drinking too much coffee may affect your sleeping patterns, fatigue, ect. I strongly recommend trying yerba mate. It provides a strong natural boost, doesn't interfere with sleep, ant is extremely healthy.

Good Luck

I wonder if you're overdoing it? Often when my body complains, that is, I feel quite tired (not the sleepy tired, but the physical body-tired), I know it's time to give my muscles a rest.

Hello mewilli2! There are many factors to consider in gauging fatigue after workouts. If you're jumping back in to an intense program after being out of commission for a bit, your body might being wondering the heck you're thinking ;) It's trying to get used to what you're asking of it. Now that you've increased your activity, have you increased your caloric intake? You're using more calories, so you might want to make sure you replenish your nutrients (ideally within two hours of finishing your workout, when your body needs it most). I hope this helps, and if you'd like to speak more specifically about it, let me know!