Some guy from Outside magazine tested this himself, went on a drug program of steroids, epo, and hgh. His eyesight got better, he was stronger, and his cycling rides much easier. He was riding with and away from people he's never ridden with before. He finished refreshed while others finished dead tired.
http://outside.away.com/outside/bodywork/200311/200311_drug_test_1.html
"(I ended up spending around $7,500 for drugs in my eight-month program.)"
"I asked him what to expect.
"I really can't promise you anything about the growth hormone except that it costs a lot of money," he said with a smile. (My HGH cost about $750 a month.)
"Do you take it?"
He nodded. "I take a lot of things."
"What does it do for you?"
"That doesn't matter. It may do something for me, nothing for you—it's very response-specific." He warned me not to expect too much, too fast. "Nothing will happen very quickly. This is a gradual process.""
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IT WASN'T UNTIL I ADDED EPO to my diet, two weeks later, that I began to notice serious differences.
"You have to be careful with this stuff," Dr. Jones warned after explaining the routine: three injections a week of 1,500 IU each. I was expecting a lecture on the dangers of thickened blood, but he meant something else: he wanted me to take it easy while racing, lest people catch on.
"One of my bike racers who isn't really a climber went on a training ride and dropped the best climbers on his team," he said. "They were like, 'Um, what are you taking?'"
It wasn't cheap—$2,000
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After the EPO kicked in, I rode a 200-miler and I felt strong, fresh, ready to hammer. The next day I easily could have ridden another 200. It all started to make sense: recovering this fast would be a huge advantage in a stage race like the Tour de France.
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for ten vials totaling 100,000 IU. At my prescribed dose, each vial would last two weeks. Before the first EPO shot, my base hematocrit level was 43.8 percent, well below that magical 50 percent disqualification level. That seemed like a reasonable goal—hematocrit levels high enough to be bounced from the Olympics. Sweet.
The morning after I took my first dose, I woke up with a strange headache, a very distinct kind of pain that I would come to associate with EPO. It defied all manner of ibuprofen and aspirin but gradually went away.
Within three weeks, my hematocrit level had risen to 48.3. By this time, my testosterone levels had shot up to 900 nanograms per decaliter, from a previous mark of 280. (My starting level was just below normal.) My HGH had increased only slightly, which Dr. Jones found unusual. He upped my HGH dosage to 1.2 IU a day, speculating that the long hours I spent training might be keeping the level down.
Despite these measurements, I remained skeptical about all the drugs until March 29, when I rode an event along the central coast of California, the Solvang Double Century, at what for me was a fast and hard pace, finishing in around 11.5 hours. About ten hours in, it dawned on me that something was definitely happening. Sure, I'd been training hard, but I'd done enough of that to know what to expect. All around me were riders—good, strong riders—who looked as worn out as you'd expect after ten hours in the saddle. I was tired, but I felt curiously strong, annoyingly talkative and fresh, eager to hammer the last 40 miles. The last time I'd ridden 200 miles, I felt awful the next day, like I'd been hit by a truck. After the Solvang race I woke up and felt hardly a touch of soreness. I also felt like I could easily ride another 200, and I realized that I'd entered another world, the realm of instant recovery. I'll be frank: It was a reassuring kind of world, and I could see why people might want to stay there.
When I checked in with the good doctor soon after the race, he wasn't surprised about what I'd experienced. "With your hematocrit levels higher, you don't produce as much lactic acid, which means you can ride harder, longer, with less stress. The growth hormone and testosterone help you recover faster, since you're stronger to start with and recover more quickly. All those little muscle tears repair much more quickly."
He shrugged. "It works," he said. "It always works."
It all started to make sense. Feeling like I did after the 200-miler would be a huge advantage in a long stage race like the Tour de France. I understood what five-time Tour winner Jacques Anquetil meant back in 1967 when he said, "You'd have to be an imbecile or a hypocrite to imagine that a professional cyclist who rides 235 days a year can hold himself together without stimulants."
Back then, "stimulants" mostly meant amphetamines, which kept riders going through day after day of hard stages. The new drugs had the same rejuvenating effects but simply worked much better, without the crash and depression of uppers.
I began to adjust my training schedule for harder rides and less rest and I felt fine. It wasn't a huge difference—I added about 10 or 15 percent more effort to my training—but had I been competing at a top level, it would have represented a major advantage.