Does 40m sprint time differ between running shoe and barefoot conditions?

Methods: Fifteen university students (8 males and 7 females) voluntarily participated in this experiment. The mean age was 18.87 years (SD = 1.06) ranging from 18-21 years of age. The participants were asked to wear running shoes along with any comfortable clothing of their choice. All participants provided written consent prior to commencing the experiment. The experiment took place on a hard surface, similar to a sidewalk, where the participants were asked to perform 4 x 40m sprints; 2 x shod and 2 x barefoot. The 40m distance was measured using a 5m measuring tape. The 5m distance was marked 8 times as accurately as possible. The markings were checked by two individuals looking straight down at the point to avoid any parallax error. The time was monitored by two individuals placed at the start and end points. The time monitors clearly communicated with each other in regards to when the participant crosses the start and end points. The lower time of the two was recorded and the participant was asked to sprint again. The faster times out of the two shod sprints and the two barefoot sprints were recorded for further analysis. The participants was given 5 minutes break between the two shod runs and barefoot runs.

 

Participant No. Running Shoe Barefoot
1 5.66 5.7
2 6.02 6.23
3 8.2 8.15
4 8.13 7.55
5 7.56 7.15
6 7.02 6.35
7 7.28 7.1
8 7.32 6.95
9 7.45 8.07
10 6.92 6.75
11 7.67 7.36
12 8.28 8.01
13 5.88 5.53
14 6.89 6.56
15 7.04 7.33