The effect of isokinetic training was investigated for the strength development in the thigh muscles under various training conditions. Thirty one males from healthy high-school students served as subjects of this study. Training was performed using a Cybex II machine with two kinds of repeated load conditions (number of repetitions, cf. Table 1 & Fig. 1) at to different rotational speeds (30 degrees and 180 degrees per second) . The training was done three times per week for nine weeks. The effects of training were evaluated on the basis of the amount of increase in the strength during knee flexion and extension.
The results were summarized as follows :
1) The effect of training became apparent most swiftly under the rotational speed of 180 degrees per second and light load of repetitions, respectively.
2) The largest increase in the muscluar strength was observed for the group with training speed of 180 degrees per second and hevey load of repetitions, respectively.
3) The strength increased periodically every four or five week for all conditions.

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安静時の経口糖負荷試験において, 正常とみなされた日常定期的な運動を実施していない健康な男子学生4名を被検者とした.各被検者に運動負荷時間が異なる3種類の中等度運動を実施し, 運動後に糖を経口負荷した際の糖代謝について検討した.結果は以下に示すごとくである.
1) 糖負荷後の血糖は運動負荷時間が60分間の場合において糖負荷後60, 90, 120, 180分にOGTTよりも高値を示し, 安静値水準への回復に遅延傾向が認められた.
2) 糖負荷後の血清インスリンは20分間, 40分間運動がOGTTに比べ低値を示し, 60分間運動は糖負荷後30分値を除きOGTTと同様な値であった.また, 血清C-ペプチドも各運動とも血清インスリンを反映する変動であった.
3) 安静値に対する血清FFAの増加量は, 各運動とも運動開始に伴い増加し, 運動後20分の糖負荷前においても増加傾向を示した.
4) 血漿cAMPは運動終了直後で60分間運動が最も高値を示し, その後各運動とも糖負荷前まで低下傾向を認めたが, 安静値水準には至らなかった.糖負荷前値においても60分間運動が若干高値を示した.
これらのことから, 中等度運動後に糖を経口負荷した時の糖代謝は, 運動負荷時間が20分間, 40分間の場合にはOGTTとほとんど差が認められなかったが, 60分間の場合には血糖の安静値への回復に遅延傾向が認められた.このような運動後に糖を負荷した場合, 運動による血清FFAの増加が糖の取り込みを抑制することが示唆される.本研究は文部省科学研究費, 奨励研究 (A) No.58780128により行われた.

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本研究は, サーモグラフィで上肢動的及び静的運動時の活動筋上, 非活動筋上の皮膚温を観察し, 次のことが明確になった.
1.サーモグラフィは, サーミスタ素子による測定法より詳細に広範囲な運動時の皮膚温動態を得ることができた.
2.動的運動時のサーモグラフィによる観察から, 非活動筋上の皮膚温は運動初期に低下を示したが, 活動筋上の皮膚温は上昇が観察された.
3.静的運動時の場合, 運動初期の低下は非活動及び活動筋上の皮膚温で生じた.
4.静的運動時, 前腕部皮膚温の低下は, 運動強度が大きくなるとあらわれ, それと同時にその低下範囲が拡大する傾向にあった.

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The laxity of shoulder is one of main factors affecting shoulder lesions in athletes.
To measure the anterior-posterior laxity of shoulder, a stress machine was arranged because the ordinary rentogenographic measurement is not suitable. The measurement of the anterior-posterior laxity was done with athletes in several kinds of sports in which shoulder joints are mainly used. The result was compared with those from clinical examinations and stress rentogenography. Conclusions :
1. The anterior-posterior displacements of the affected side in baseball, volleyball and javelin players were significantly larger than that of the control side.
2. For the anterior-posterior displacement of the shoulder joint, baseball, volleyball and javelin players showed significantly larger values than truck runners as the control whereas significantly smaller values were found in water polo players.
3. There was no correlation between the anterior-posterior laxity and the inferior laxity.

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思春期の子供の発育に運動が与える影響を明らかにするため.サッカー部に所属する男子学童 (運動群) と一般の男子学童 (対照群) について生体計測と骨年齢の測定を行って, 次のような結果を得た.
1) 各生体計測値は, 対照群が大きい傾向にあった.
2) 骨年齢は対照群が早熟傾向を示した.
3) 各生体計測値と骨年齢, 暦年齢の相関係数は両群とも骨年齢で高く, 特に運動群では両相関係数間に差がみられた.
4) 各生体計測値, 骨年齢の増加量の相関分析から, 運動群では身長等の骨格系の発育と体重・胸囲の発育に相違がみられた.
5) 運動が骨年齢の早熟化に与える影響はみられないが, 骨の量的, 質的な発育の関係を密接にすることが示唆された.

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Oxidation of lactate at rest (RE, n=4), or after short strenuous exercise (EX, n=6) was investigated in rats. Food and water were given ad libitum before experiment. In EX, rats ran to exhaustion at the speed of 80-100 m·min^-1. Immediately after exercise, 4 μCi of (U-¹⁴C) lactate was injected into aorta through an indwelling catheter. In RE, (U-¹⁴C) lactate was injected into the rats at rest. Expired gas was collected by a Brooks type bottomless chamber on treadmill belt for 120 min. In EX, exercise duration was 109±18 sec (mean±SE), and maximum blood lactate concentration after the exercise was 23.7±2.1 mM (mean±SE) . Cumulative percent recovery of ¹⁴C as ¹⁴CO₂ for 120 min was 48.5±2.8% for EX and 61.7±0.9% for RE (mean±SE) . Significant difference was found between these two rates (p<0.01) . After 50 min of recovery, mean volume of ¹⁴CO₂ expired per min in RE was significantly greater than that in EX (p<0.01) . Mean volume of ¹⁴CO₂ expired per min per VCO₂ in RE was always greater than that in EX, and significant difference was found at 7.5 min of recovery (p<0.01) . It is concluded that although the rate of recovery of ¹⁴C as ¹⁴CO₂ after exercise is lower than that at rest, the major pathway of lactate metabolism after short strenuous exercise is oxidation.

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