In order to secure accurate information on the distribution of artificial cranial deformation, both in time and in space, as an aid to cultural reconstructions, and to the allocation of burials and archaeological features associated with burials, a series of diagrams illustrating six types of deformation found in the eastern United States are given in Fig. 37. Another type, the lambdoid deformation of the Chaco Canyon region of New Mexico, is merely included for comparison with natural lambdoid flattening and obelionic deformation. All these finer distinctions of types of artificial deformation and a number of others have been previously recognized and have appeared in print, but only those that were found to be characteristic of groups of people have been accepted, thereby eliminating individual variations. No distinction has been made between unintentional and intentional deformation since it is often difficult to decide this question in series of crania of groups of people who deformed the skulls only mildly, nor are the various cradling practices producing the different types of deformation considered here.
We investigated whether an athlete's self-chosen nutrition strategy (A), compared with a scientifically determined one (S), led to an improved endurance performance in a laboratory time trial after an endurance exercise. S consisted of about 1000 mL·h(-1) fluid, in portions of 250 mL every 15 min, 0.5 g sodium·L(-1), 60 g glucose·h(-1), 30 g fructose·h(-1), and 5 mg caffeine·kg body mass(-1). Eighteen endurance-trained cyclists (16 male; 2 female) were tested using a randomized crossover-design at intervals of 2 weeks, following either A or S. After a warm-up, a maximal oxygen uptake test was performed. Following a 30-min break, a 2.5-h endurance exercise on a bicycle ergometer was carried out at 70% maximal oxygen uptake. After 5 min of rest, a time trial of 64.37 km (40 miles) was completed. The ingested nutrition was recorded every 15 min. In S, the athletes completed the time trial faster (128 vs. 136 min; p ≤ 0.001) and with a significantly higher power output (212 vs. 184 W; p ≤ 0.001). The intake of fluid, energy (carbohydrate-, mono-, and disaccharide), and sodium was significantly higher in S compared with A (p ≤ 0.001) during the endurance exercise. In the time trial, only sodium intake was significantly higher in S (p ≤ 0.001). We concluded that a time trial performance after a 2.5-h endurance exercise in a laboratory setting was significantly improved following a scientific nutrition strategy.
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