본 연구는 운동 형태의 차이가 혈중 근 손상지표(LDH)와 피로물질(NH3, lactic acid)에 미치는 영향을 비교분석하여 운동 처방의 기초자료를 제공하는 데 목적이 있었다. 연구의 목적을 달성하기 위해 B 대학 스포츠안전지도학과 20대 남자 재학생을 대상으로 HIIT, HICT를 동일에너지 소비 하에 처치했을 때 NH3, lactic acid, LDH의 혈중 농도의 변화를 관찰하였다. 실험 조건은 HIIT, HICT 두 가지 운동 형태를 동일 집단에 HRR 85%의 운동 강도로 200Kcal를 소모하는 시점까지 처치하였으며, LDH, NH3의 혈중 농도를 운동 전, 운동 후에 측정하고 lactic acid는 운동 전, 운동 후, 회복기 5분에 측정하여 다음과 같은 결론을 얻었다.

첫째, 동일에너지 소비 하 HRR 85% 강도의 HIIT, HICT 처치 시 LDH 농도는 HIIT에서 운동 후 21.6% 증가하였고, HICT에서는 운동 후 44.1% 증가하였다. 통계적으로 측정 시기에서 운동 후에 유의한 차이로 증가하였고(p<.001), 측정 시기와 운동 형태 간 상호작용에서는 유의한 차이가 나타나지 않았으며(p>.05), 운동 형태에서는 수치상의 차이는 있으나 통계적으로 유의한 차이는 나타나지 않았다(p>.05).

둘째, 동일에너지 소비 하 HRR 85% 강도의 HIIT, HICT 처치 시 NH3 농도는 HIIT에서 운동 후 169.1% 증가하였고, HICT에서는 운동 후 140% 증가하였다. 통계적으로 측정 시기에서 운동 후에 유의한 차이로 증가하였고(F=61.425, p<.001), 측정 시기와 운동 형태 간 상호작용에서는 유의한 차이가 나타나지 않았으며(p>.05), 운동 형태에서는 수치상의 차이는 있으나 통계적으로 유의한 차이는 나타나지 않았다(p>.05).

셋째, 동일에너지 소비 하 HRR 85% 강도의 HIIT, HICT 처치 시 lactic acid 농도는 HIIT에서 운동 후 660% 증가했다가 회복기 5분에 12.1% 감소하였고 HICT에서는 운동 후 863% 증가했다가 회복기 5분에 6.2% 감소하였다. 통계적으로 측정 시기에서 운동 후에 유의한 차이로 증가하였고(F=101.436, p<.001), 측정 시기와 운동 형태 간 상호작용에서는 유의한 차이가 나타나지 않았으며(p>.05), 운동 형태에서는 수치상의 차이는 있으나 통계적으로 유의한 차이는 나타나지 않았다(p>.05). 측정 시기에서 유의한 차이에 대한 Tukey‘s Post-hoc Test 결과 HIIT, HICT 두 가지 운동 형태에서 운동 후-회복기 5분 구간을 제외하고 유의한 차이가 나타났다(p<.001).

이상을 종합해 보면 전반적으로 HIIT, HICT 모두 운동 후에 유의한 증가를 보였으나, 운동 형태 간 차이는 수치상의 변화에도 불구하고 유의성이 나타나지 않았다. 이는 표본의 수가 8명으로 적은 데 따른 표집오차가 크다는 점에 귀인한 것으로 판단되며, 실제적 유의성에 입각한 연구자의 종합적 판단으로는 전반적으로 HICT의 근육 군 동원의 변화에 비해 HIIT의 불완전 휴식이 근 손상지표(LDH) 및 피로물질(lactic acid)에 긍정적인 영향을 미친 것으로 판단된다. 다만 NH3의 경우 HIIT에서 소폭 더 높은 농도로 관찰되는 상반된 결과가 나타나기도 했지만 운동 시간이 소폭 더 길었던 점을 고려했을 때 전반적으로 HIIT의 불완전 휴식이 근 손상 및 피로물질(lactic acid, NH3)에 긍정적 영향을 미친 것으로 판단하는 것이 타당할 것으로 사료된다.

This study has conduct HIIT and HICT under the same energy consumption, which in a busy modern society can see the effects of exercise in a short period of time. The purpose of the Chapter is to provide basic data on exercise prescriptions by comparing the effects on blood muscle damage indicators (LDH) and fatigue substances (NH3, lactic acid).
In order to achieve the purpose of the study, a change in the concentration of NH3, lactic acid, and LDH was observed when HIIT and HICT were treated under the same energy consumption for sports safety leadership at B University and male students in their 20s. The two types of exercise were determined by the test conditions of HIIT and HICT until the time to consume 200Kcal with 85 % of the HRR in the same group, and the blood concentration of LDH and NH3 was measured before and after exercise. lactic acid was measured before, after exercise, and after 5 minutes of recovery, and the following conclusions were obtained.


1. HIIT and HICT of HRR 85% strength were performed under the same energy consumption. LDH concentration increased from 305.87 ± 78.97 U / L before exercise to 372.00 ± 121.82 U / L after exercise in HIIT, and increased by 21.6%. In HICT, it increased by 44.1% from 345.12 ± 75.31U / L before exercise to 497.50 ± 117.08U / L after exercise. Statistically, there was a significant difference after exercise in the measurement period (F= 20.984, p<.001). There was no significant difference in the interplay between measurement period and exercise type (F=3.27, p>.05). There was a numerical difference in the form of exercise. However, There was no statistically significant difference (F=3.46, p>.05).

2. HIIT and HICT with HRR 85% strength at the same energy consumption were performed. NH3 concentration was increased from 93.50 ± 21.62μg / dL before exercise to HIIT by 259.62 ± 83.06μg / dL after exercise. In HICT, it increased 140% from 87.50 ± 26.06μg / dL to 210.50 ± 71.35μg / dL after exercise. Statistically, there was a significant difference after exercise in the measurement period (F=61.425, p<.001). There was no significant difference in the interplay between measurement and exercise type(F=.959, p>.05). There was a numerical difference in the form of exercise. However, there was no statistically significant difference (F=1.112, p>.05).

3. HIIT and HICT were performed with HRR 85% strength under the same energy consumption. In the HIIT, lactic acid concentration increased by 660% from 16.43 ± 12.82mg / dL before exercise to 124.92 ± 41.43mg / dL after exercise, and decreased to 109.80 ± 46.45 mg / dL 12.1% after 5 minutes of exercise. In the HICT, lactic acid concentration increased by 863% from 14.63 ± 7.46mg / dL before exercise to 141.03 ± 35.61mg / dL after exercise, and decreased to 132.22 ± 42.08 mg / dL 6.2% after 5 minutes of exercise. Statistically, there was a significant difference after exercise in the measurement period (F=101.436, p<.001). There was no significant difference in the interplay between measurement and exercise type(F=.959, p>.05). There was a numerical difference in the form of exercise. However, there was no statistically significant difference (F=1.112, p>.05). One-way ANOVA was used for Tukey''s post hoc tests of significant differences in time of measurement. As a result, there was a significant difference between HIIT (F=20.516, p<.001) and HICT (F= 38.615, p<.001). Tukey''s post hoc tests results showed significant differences except for the post ? exercise 5 min interval in both types of HIIT and HICT (p<.001)

Overall, both HIIT and HICT showed a significant increase after exercise. The differences between the types of exercise were not significant in spite of the numerical changes. This is attributed to the fact that the sampling error is large due to the small sample size of 8 persons. The researchers'' comprehensive judgment based on practical significance suggests that the low intensity exercise of the incomplete rest period of HIIT positively affects the LDH and lactic acid rather than the change of muscle mobilization of HICT do. However, in NH3, HIIT showed a slightly higher concentration, which is the opposite result. Considering that HIIT had a slightly longer exercise time, it is reasonable to assume that HIIT has a positive effect on muscle damage and lactic acid, NH3.