If you've eaten enough - and properly - before your workout, what you eat after is not critical. Just eat a mixed meal and be done with it.
If you have eaten well through the day, you'll have an available pool of amino acids.
You won't need to spike insulin if you aren't completely starved.
Some folks like the "spike it afterward" approach. Some prefer to eat a modest mixed meal an hour or so beforehand, sip a dilute whey and dextrose shake during, and just eat a solid meal afterward.
It all works.
I disagree with this. It is extremely critical if you want to gain size.
In general, I would probably agree with you. Personally, I've found that by paying attention to how my body feels after a meal, I can tinker with the timing of pre and post workout nutrition in a way that works well with my particularly insulin-resistant old body. When I'm more insulin-sensitive, post workout carbs "feel" right to me. When I'm not, they make me hungry - a sure sign I'm overproducing insulin and not partitioning well. Not everybody is so finely tuned to the relationship between insulin sensitivity and how they feel at different bodyfat levels, I'm the first to admit. It took me a looooong time to work this part out for myself.
For a young man who is not particularly over-fat and who is using reasonable training volume for his well-set-up workouts, plenty of heavy compounds etc, the increased insulin sensitivity in the postworkout window is a great time to enhance glucose uptake, and a little pop of insulin to blunt cortisol will do a body good.
Post-workout, as many of you know, glucose transporters remain translocated to the surface of your muscle cells, mediating increased glucose uptake even in the absence of insulin. You certainly don't need to "spike" insulin at this time to encourage glucose uptake.
DG, perhaps this is why you are noticing this need not be a massive glucose-induced spike - your oats are working just fine for you, and you are likely well and properly nourished pre workout as well.
There is a great deal of research that suggests pre- and during-workout nutrition may be more critical than postworkout nutrition in this regard.
Noteworthy is Tipton et al, 2001:
Timing of amino acid-carbohydrate ingestion alters anabolic response of muscle to resistance exercise -- Tipton et al. 281 (2): E197 -- AJP - Endocrinology and Metabolism
Am J Physiol Endocrinol Metab. 2001 Aug;281(2):E197-206.
Timing of amino acid-carbohydrate ingestion alters anabolic response of muscle to resistance exercise.
Tipton KD, Rasmussen BB, Miller SL, Wolf SE, Owens-Stovall SK, Petrini BE, Wolfe RR.
Department of Surgery, University of Texas Medical Branch, Galveston, Texas 77550, USA.
ktipton@utmb.edu
The present study was designed to determine whether consumption of an oral essential amino acid-carbohydrate supplement (EAC) before exercise results in a greater anabolic response than supplementation after resistance exercise. Six healthy human subjects participated in two trials in random order, PRE (EAC consumed immediately before exercise), and POST (EAC consumed immediately after exercise). A primed, continuous infusion of L-[ring-(2)H(5)]phenylalanine, femoral arteriovenous catheterization, and muscle biopsies from the vastus lateralis were used to determine phenylalanine concentrations, enrichments, and net uptake across the leg. Blood and muscle phenylalanine concentrations were increased by approximately 130% after drink consumption in both trials. Amino acid delivery to the leg was increased during exercise and remained elevated for the 2 h after exercise in both trials. Delivery of amino acids (amino acid concentration times blood flow) was significantly greater in PRE than in POST during the exercise bout and in the 1st h after exercise (P < 0.05). Total net phenylalanine uptake across the leg was greater (P = 0.0002) during PRE (209 +/- 42 mg) than during POST (81 +/- 19). Phenylalanine disappearance rate, an indicator of muscle protein synthesis from blood amino acids, increased after EAC consumption in both trials. These results indicate that the response of net muscle protein synthesis to consumption of an EAC solution immediately before resistance exercise is greater than that when the solution is consumed after exercise, primarily because of an increase in muscle protein synthesis as a result of increased delivery of amino acids to the leg.
<snip>
From "Discussion", in the full version:
The ingestion of a relatively small amount of essential amino acids, combined with carbohydrates, is an effective stimulator of net muscle protein synthesis. The stimulation of net muscle protein synthesis when EAC is consumed before exercise is superior to that when EAC is consumed after exercise. The combination of increased amino acid levels at a time when blood flow is increased appears to offer the maximum stimulation of muscle protein synthesis by increasing amino acid delivery to the muscle and thus amino acid availability.
Now I'm not saying post workout nutrition should be ignored - just that it need not be the insulin spiking WHACK many of us have been lead to believe - although if you handle that insulin and glucose well, have at 'er, by all means.