Effect of cluster set resistance training combined with high-intensity interval training on cardiorespiratory and muscular fitness in untrained young men.

Both CSRT-HIIT and TRT-HIIT produced significant increases in 1RM strength for all four measured exercises after 12 weeks.

• 1RM weights for squat, bench press, deadlift, and rowing all increased significantly compared to baseline in both groups.
• Improvements were observed with P < 0.05 for both groups.
• No statistically significant differences were found between the two groups for 1RM measures (P > 0.05).
• Participants were untrained young men (n = 22 total, randomly assigned to each group).

Both training protocols significantly increased maximum oxygen uptake (VO2max) after 12 weeks.

• Significant increases in maximum oxygen uptake were observed in both the CSRT-HIIT and TRT-HIIT groups compared to baseline (P < 0.05).
• No statistically significant differences were found between the groups for VO2max (P > 0.05).
• The intervention duration was 12 weeks.
• Participants were untrained at baseline.

Both training protocols significantly increased maximum training volume at 70% 1RM and standing long jump performance.

• Significant increases were observed in maximum training volume at 70% 1RM in both groups compared to baseline (P < 0.05).
• Standing long jump distances also increased significantly in both groups (P < 0.05).
• No statistically significant between-group differences were found for either variable (P > 0.05).

Both training protocols significantly increased muscle thickness of the pectoralis major, biceps brachii, and rectus femoris.

• Significant increases in muscle thickness were observed for all three muscles in both groups compared to baseline (P < 0.05).
• No statistically significant differences were found between the CSRT-HIIT and TRT-HIIT groups for muscle thickness measures (P > 0.05).
• Muscle thickness was assessed using ultrasound or similar measurement methodology as referenced in the study.

Both training protocols produced a significant decrease in body fat percentage after 12 weeks.

• Body fat percentage decreased significantly compared to baseline in both the CSRT-HIIT and TRT-HIIT groups (P < 0.05).
• No statistically significant difference in body fat percentage reduction was found between the two groups (P > 0.05).
• The study included 22 untrained young male participants randomly assigned to the two conditions.

CSRT-HIIT was found to be an equally effective training modality compared to TRT-HIIT across all measured outcomes.

• No statistically significant between-group differences were observed for any measured variable including strength, cardiorespiratory fitness, muscle thickness, body composition, or muscular power (P > 0.05).
• The study concluded that CSRT-HIIT is 'an equally effective alternative to traditional TRT-HIIT.'
• The intervention lasted 12 weeks with 22 untrained young men.
• Outcomes measured included body composition, cardiovascular fitness, and muscular fitness.