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- W2003227890 abstract "1227 The characteristics of deep water running (DWR) that explain a cross training stimulus to on-land running (Eyestone, Fellingham, George, & Fisher, Am J Spts Med, 21(1), 1993) are not known. Kinematics (Kilgore, dissertation 2003) and physiology (e.g., Svendenhag & Seger, MSSE, 24(10), 1992) during DWR have been studied, but there is no research investigating muscle activity during DWR or if the activity is different than cycling (CYC) relative to on-land running. PURPOSE Investigate magnitude of muscle activity during DWR, treadmill running (TMR), and cycling (CYC). METHODS Five female subjects (mean (std dev): age 26(4.0) yrs; height 1.7(0.1) m; mass 65(5.8) kg) completed TMR, DWR and CYC (on-land) conditions. Unilateral electromyography (EMG) for rectus femoris (RF), vastus lateralis (VL), biceps femoris (BF) and gastrocnemis (GA, lateral head) were recorded (1000Hz) during two levels of self-determined exercise intensity: somewhat hard (Int1) and hard (Int2). Condition order was always TMR, CYC, DWR with Int1 preceding Int2 per mode. During DWR, subjects used a high-knee technique and wore a dry-suit and flotation device (tethered to pool side). For all modes, testing began with subjects self-determining graded intensity until the target intensity was reached with data recorded across 30 seconds at the target intensity. EMG data were processed by removing DC-bias, smoothing (low-pass filter, fc = 100 Hz), and calculating the root mean square magnitude. For each muscle, a repeated measures ANOVA was used to compare EMG across mode (3 levels) and intensity (2 levels). EMG data were normalized to TMR Int1 levels for presentation. RESULTS For all muscles, there was no mode by intensity interaction (Table 1). BF and GA were more active during TMR than CYC and DWR (p<0.05). VL and RF were not different between modes. CONCLUSIONS Any potential benefits of DWR or CYC as a substitute for on-land running do not seem directly related to magnitude of muscle activity. It is conjectured that a training stimulus may be manifested within muscle activation patterns vs. magnitude.Table" @default.
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- W2003227890 date "2004-05-01" @default.
- W2003227890 modified "2023-09-26" @default.
- W2003227890 title "Environmental Influences on Lower Extremity Muscle Activity During Running" @default.
- W2003227890 doi "https://doi.org/10.1097/00005768-200405001-00854" @default.
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