Athletic-Performance

The Key Points Summarizing the Report

• Standing broad jump measurements were taken both with and without the Relive Shirt.
• Each condition involved three jumps.
• Average standing broad jump without Relive Shirt: 209.6 cm.
• Average standing broad jump with Relive Shirt: 212.3 cm.
• T-test results showed a statistically significant improvement with Relive Shirt (P < 0.01).
• Wearing the Relive Shirt led to a statistically significant increase in standing broad jump performance.
• Suggests that the Relive Shirt may effectively enhance jumping ability in active high school soccer players.

Title: The Impact of Wearing "Relive Shirts" on Athletes’ Physical Performance

By Yuto Suzuki, Graduate School of Integrated Science, Sports Health Science Program, Iwate University

Supervised by Prof. Michinari Asanuma

Date of Creation: January 17th

• Introduction:
• The "Relive Shirt" is a functional garment made of 100% polyester with a contracting property, incorporating power stones dyed into the fabric at the shoulder and abdominal areas.
• Previous studies suggest that wearing the Relive Shirt improves range of motion, grip strength, and back muscle strength, as well as reduces daily fatigue. However, previous subjects were females aged 30 to 59 who did not engage in regular exercise.
• This study aims to investigate the impact of Relive Shirt on the performance of active high school soccer players aged 15 to 18, who exercise more than 5 times a week.
• Methods:
• (1) Subjects: The study involved 21 male high school soccer players aged 15 to 18, exercising for more than 2 hours per week.

(2) Selection Criteria:

• Age: 15 to 18 years
• Gender: Male
• Healthy individuals (defined as those without severe organ impairments, specific diseases, and not undergoing related treatments or drug therapy, as self-reported at the beginning of the experiment).
• Individuals exercising more than 2 hours, 5 times a week.
• Individuals not currently participating in other experiments.

(3) Verification Method: Standing broad jump measurements were taken three times each with and without wearing the Relive Shirt, and the results were compared. The experimenter wore a black shirt to ensure they could not distinguish between the Relive Shirt and non-Relive Shirt conditions during the jumps.

(4) Statistical Processing: All statistical analyses were conducted using Excel. The comparison of average values for each group was performed using the t-test, with a significance level set at less than 5%.

Results:

• The results of the standing broad jumps for the 21 high school soccer players are shown in Table 1 and Graph 1.
• The average standing broad jump without the Relive Shirt was 209.6 cm, while with the Relive Shirt, it was 212.3 cm.

[Table 1: Standing Broad Jump Results with and without Relive Shirt for High School Soccer Team Members]

Without Wearing Relive Shirt | While Wearing Relive Shirt

---------------------------- | --------------------------

236.6 cm                     | 238.3 cm

209 cm                        | 212.6 cm

221 cm                        | 231 cm

196.3 cm                      | 205.3 cm

199.3 cm                      | 205.6 cm

172.6 cm                      | 170.3 cm

206.3 cm                      | 211.6 cm

241 cm                        | 242 cm

209.3 cm                      | 217.6 cm

214 cm                        | 215.3 cm

215 cm                        | 222.3 cm

215.3 cm                      | 222.3 cm

188.6 cm                      | 184.3 cm

214.2 cm                      | 206.3 cm

233.3 cm                      | 239.6 cm

199.6 cm                      | 195 cm

183 cm                        | 187.3 cm

195.3 cm                      | 197 cm

206 cm                        | 207.6 cm

203.6 cm                      | 208 cm

243.3 cm                      | 240.3 cm

[Graph 1: Changes in the Average of Standing Broad Jumps with and without Relive Shirt]

Discussion:

The average standing broad jump without the Relive Shirt was 209.6 cm, and with the Relive Shirt, it was 212.3 cm.

By conducting a t-test (a test for the average of paired samples), a statistically significant improvement in average values was observed (P < 0.01).

Therefore, it is suggested that wearing the Relive Shirt resulted in a statistically significant increase in standing broad jump performance.

• Conclusion:
• This study aimed to assess the impact of wearing the Relive Shirt on the performance of active high school soccer players aged 15 to 18, exercising more than 5 times a week. The results showed a statistically significant increase in standing broad jump records with and without the Relive Shirt.
• Thus, it is concluded that the Relive Shirt is effective in improving jumping ability.

References:

• TFC Lab Co., Ltd. (2021) Verification Test of the Effects on the Body by Wearing Relive Shirts and Pants.