Increased dietary carbohydrate and endurance during single-leg cycling using a limb with normal muscle glycogen concentration

The purpose of this study was to test the hypothesis that increased availability of blood-borne glucose would improve endurance after carbohydrate loading. A single-leg exercise model was employed, taking advantage of the fact that supercompensation of muscle glycogen occurs only in a previously exercised limb. Endurance time to exhaustion at 70% of maximal oxygen uptake (VO2 max) was determined for 11 males and three females who were then allocated to a control group or a high-carbohydrate (CHO) group. For 3 days following Test 1 the control group maintained a prescribed normal diet whilst the CHO group increased the proportion of energy derived from carbohydrate (62.1 +/- 4.3% cf. 43.9 +/- 2.0%, P less than 0.01). The endurance test was then repeated using the leg that was inactive during Test 1. Endurance time was increased on Test 2 (123.7 +/- 43.2 min cf. 98.5 +/- 21.9 min, P less than 0.05 one-tailed test) for the CHO group but not for the control group (101.8 +/- 21.7 min cf. 107.5 +/- 9.1 min, NS). There was no indication of enhanced carbohydrate metabolism during Test 2 for the CHO group but mean heart rate was lower during Test 2 than during Test 1 (145 +/- 14 beat min-1 cf. 152 +/- 12 beat min-1, P less than 0.05). These results suggest that the prior consumption of a high-carbohydrate diet improves endurance during high-intensity cycling with a limb with normal muscle glycogen concentration.     

Design of Engineering Curricula for Developing Countries

This paper suggests chat engineering curricula should be designed on the basis that engineering is a vocation. It outlines how curricula might be developed by identifying engineering jobs and proceeding from job specification through engineering capability profiles to subjects of instruction. The need for manpower planning is stressed. Some problems related to small student numbers are outlined and some options offered for solution of such problems.     

The physician as writer

A surgeon, turned writer, discusses his experiences and the perils of changing professions. He reminisces about his early formative years, growing up in Troy, New York, and investigates the beauty of language and the pitfalls of misuse.     

Laboratory and research

PAPERS IN RHETORIC AND POETIC. Edited by Donald C. Bryant. Iowa City: University of Iowa Press, 1965; pp. vii+96. $2.95; paper $1.95.     

From seggiolini to discussione: the generation and extension of peer culture among Italian preschool children

In this paper the origins and development of peer culture are charted through the identification and analysis of children's peer routines in the Italian asilo nido and scuola matema. In the asilo nido the children produced several primarily nonverbal play routines which had identifiable participant structures and were produced consistently over the course of the school year. In the scuola matema the children produced a variety of both verbal and nonverbal routines. The authors give a detailed analysis of one routine, the children's construction and participation in verbal debate or discussione. They then compare features of the routines in the asilo nido and scuola matema in an attempt to capture the origins and development of peer culture in the Italian preschool educational system.