| Let me show you how I know. Not with my opinion, but with a study that set out to test whether the pain does anything at all. |
| Researchers at Northern Arizona University and the University of Utah took fourteen healthy adults, eight men and six women, none of whom had done any leg resistance training in the previous year. Everyone was put on the same machine, a leg cycle that drives the pedals back toward you while you push against them, for twenty minutes, three times a week, for eight weeks. |
| The difference was the start. One group went straight into the full session, which is the version almost everyone gets. The other group got three weeks of ramping up first, beginning at five minutes on the lowest setting and adding a little each time. By the end of the study the total work done was equal for both groups. Only one group ever got sore. |
| What they found |
| Northern Arizona University, 2011. Flann et al., Journal of Experimental Biology. |
| The damaging first week (they got sore) |
| Creatine kinase, the blood marker for muscle damage, peaked around 580 units per liter in week five, against a normal reading of 150 or below. Soreness scores were much higher early on. Thigh muscle volume rose 7.5 percent and strength rose 26 percent. |
| The three week ramp up (they did not) |
| That same marker never once crossed the normal line, and the soreness scores stayed low the whole way through. Thigh muscle volume rose 6.5 percent and strength rose 25 percent. The gap between the two groups was too small to count. |
| Same total work, same muscle, same strength. One group simply paid for it in soreness. |
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| In other words, the pain bought her nothing. It was not the price of the result. It was a side effect of starting too fast. |
| Her discipline had nothing to do with it. Neither does yours. |
| So why does the first week hurt so much more than the tenth? |
| Soreness appears to be the body’s answer to a pattern of loading it has not met in a while, and it is worst when a muscle is lengthening under weight: the lowering half of a squat, the step down off a box, the last lunge of a set. Those are the contractions that produce the highest force, which is also why they build strength so well. Give a cold muscle all of that force at once and it leaks creatine kinase into the blood, and the ache lands a day or two later. Introduce the same force in small steps and the muscle adapts without the ache. In this study the growth signal measured inside the muscle rose by a similar amount either way, which suggests the building was going on in both groups, sore or not. |
| She never stood a chance in that first week. Neither did you, I’d bet. |
| That’s the part no one says out loud… a plan that wrecks you on day one is not a harder plan. It is a worse start. |