Aquatic treadmill running reduces muscle soreness following intense sprint exercise in trained men

Delayed onset muscle soreness is associated with muscle damage, disturbances in proprioception, and decreases in muscular power. The purpose was to determine if short duration aquatic treadmill (ATM) running reduces muscle soreness following intense sprint exercise in trained men. Twenty trained men (180.3±4.4cm, 86.3±5.8kg, 20±1yr) were recruited and randomly divided into two groups: ATM recovery (ATMRec) and passive recovery (PRec). During testing, subjects performed a warm-up followed by sixteen 110yrd cutback runs with a sprint of 60yrds, sharp change of direction, and a return sprint of 50yrds. Work to rest ratio was set at 1:3. Additionally, following exercise, the ATMRec group performed ATM running using a HydroWorx® treadmill at 5mph, 50% maximal jet resistance, and water(33°C) level at chest depth for 10min. Both groups then evaluated their level of soreness/pain using a numerical rating scale (NRS: 0-10, 0=no pain, 10=worst pain) immediately following all exercise (IPE), 24h, and 48h post exercise in the following regions: ARMS, LEGS, BACK, CHEST, SHOULDERS, HIPS, ABDOMEN, NECK, OVERALL. Data were analyzed for group x time interactions using a 2x3 Generalized Linear Mixed Model for non-parametric data (α≤0.05). For significant interactions, the same procedure was used to analyze between group differences at the same measurement timepoint(α≤0.05)

Design and fabrication of an implantable three-axis accelerometer for post-surgery monitoring of heart wall motion

The design and fabrication of mininiaturized three-axis accelerometers to be used in the measurement of heart wall motion are presented in this paper. Results from animal studies carried out by the group have already demonstrated the usefulness of large commercial accelerometers for this medical application. The advanced sensors proposed here consist of full wafer thickness masses supported by thin cantilever beams. Piezoresistors, which are implanted into the surface of the thin beams, are used to measure any acceleration that the masses undergo. ©2008 IEEE.</p