MRcyclist said:
Well its usually on the longer rides, towards the final stretch that I begin to see my energy level and concentration level going down. So in terms of time, about an hour to half and hour ride; and its towards that final 20 mins that I seem to have a tough time keeping up. That was basically my question: what supplements might be helpful in keeping up your energy and concentration towards that last stretch of the ride. The supplement that I have been using thus far is Amino Vital and I was wondering what supplements to other riders rely on.
In terms of road cycling, 1.0-1.5 hours is not a long ride. My point is basically that I think you are looking at this the wrong way around. You're looking for a quick fix, which probably will not work, but what you more than likely need is a good base and fitness level, a sensible training plan with rest days and/or recovery rides at low speed and power, and good nutrition. If you are tiring 40-70 minutes into a 60-90 minute ride, then this is probably a reflection of your fitness level more than anything. How hard are you riding during these sessions? Are they interval sessions, are you just hammering, or are you riding on hilly terrain? The fact that you are consistently tiring over such short distances suggests that there is something more than just a need for supplements: diet, base and fitness, medical problem, etc.
To answer your question, you can try supplements but I doubt that they will work for you. Most studies show that an energy-type drink (Cytomax or e-Load are my personal preferences) is not needed for rides less than 1.0-1.5 hours because it provides no additional benefits compared to water alone. The same is true for on-the-bike nutrition: bars and gels, with a 3-to-1 carb-to-protein ratio, or homemade food like baked potatoes are ideal, but they only make a difference for rides over 2 hours.
My recommendations are:
1. Visit your doctor. Make sure you are not anemic, have an iron deficiency, or some other problem like heart disease.
2. Get a nutritional consult and make sure you are consuming enough carbohydrates, which are essential for cyclists because cycling is an endurance sport. Too much protein will cause you to tire, and no supplements are going to fix this.
3. Develop a strong base and fitness level so you can do longer rides comfortably. This will take a while. Think about a coach or contacting someone at your local bike club to develop a good structured program for you that increases your fitness levels and provides sufficient rest and/or recovery days. One of the hardest things for a recreational rider is to know when to slow down. Rest is important for recovery.
I hope this helps and that you stick with cycling. I know it isn't the answer you were looking for, but you really should not be consistently tiring after 40-70 minutes of riding (unless you are hammering!).