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Jogging is the body movement, not only exercise but also to internal organs and lower limb exercise the major muscle groups. Exercise should choose fresh air, less traffic, ground flat at the time in the morning and evening appropriate. He walked at least every 10 minutes jogging, 5 minutes to run, back and forehead began to sweat that rate. After a period of time may be extended to 20-30 minutes. In the first exercise in the elderly when jogging, walking can be advanced - ran alternately until after the body to adapt and adjust to the whole jogging.
ISB XXth Congress - ASB 29th Annual Meeting July 31 - August 5, Cleveland, Ohio THE INFLUENCE OF KNEE AND ANKLE BRACING ON LOWER EXTREMITY KINETICS AND KINEMATICS DURING JOGGING Brian M. Campbell, PhD1, Charles W. Armstrong, PhD2, Daniel Cipriani, PhD, PT3, and James A. Yaggie, PhD, RKT4 1 Bowling Green State University, Kinesiology Division, Bowling Green, OH 2 The University of Toledo, Department of Kinesiology, Toledo, OH 3 Medical College of Ohio, Department of Physical Therapy, Toledo, OH 4 San Diego State University, Department of Exercise and Nutritional Studies, San Diego, CA email: email@example.com INTRODUCTION 50 There is substantial research on the effects of both ankle and 40 NB knee braces on lower extremity kinetics and kinematics, when Degrees 30 AB these braces are worn independently [1,2,3]. However, 20 KB A BKB bracing of the knee and ankle simultaneously, for both 10 prophylactic and rehabilitative purposes, is a common practice 0 1 in athletics. While prophylactic bracing in athletes may be Br ace Condition beneficial, some research has demonstrated potentially detrimental effects on lower extremity function. Of particular Figure 1: Left Knee Position at PKM. p = .007 concern in this regard, are the effects that may be due to the combined use of ankle and knee braces. It has been 2 speculated that that the mobility limitations induced by 1.5 multiple braces may create aberrant motion and forces at other 1 NB Nm/Kg AB joints that may result in injury. Therefore, the purpose of this 0.5 KB ABKB investigation was to determine how ankle bracing alone, knee 0 bracing alone, and ankle and knee bracing together affect 0 10 20 30 40 50 60 70 80 90 100 lower extremity kinetics and kinematics during straight ahead -0.5 % of Move m e nt Cycle jogging in healthy subjects. Figure 2: Left Knee Moments METHODS Eighteen subjects with no history of lower limb pathologies Additionally, although not statistically significant, there were within the two years prior to this study participated in the interesting trends in the joint moment data that illustrated a investigation. Each of the subjects performed a series of decreased knee extension moment in the KB and ABKB jogging trials with each of four brace conditions (no brace conditions (Figure 2). Additionally, there appeared to be a (NB), ankle brace (AB), knee brace (KB), ankle and knee reduced ankle joint moment in the AB condition when brace (ABKB)). An Ankle Stabilizing Orthosis (Medical compared to the other conditions. Finally, the ABKB Specialties Inc.) and the functional knee brace (dj condition appeared to evidence a slightly higher peak hip Orthopaedics, LLC.) were fitted to each subject according to moment compared to the other conditions. manufacturers’ guidelines. The subject rode a stationary bike, at a comfortable self selected pace for 5 minutes to provide a Previous studies have demonstrated a pattern of knee extensor period of accommodation to the braces prior to the jogging torque adaptation during jogging, associated with FKB use, trials. Each subject was then required to complete five to indicative of reduced stress on the ACL [1,2]. However no seven trials of straight ahead jogging for each of the previous research has addressed the influence of simultaneous randomized bracing conditions. Gait data was collected using knee and ankle bracing on lower extremity function. It does a six camera, 3-D HIRES video system, a gait analysis appear from the current results that knee and ankle bracing software package and two force platforms. This data was may be protecting their respective joints, through a reduction analyzed for each of the subject’s trials to determine the in the moments. However these bracing conditions may be affects of the different brace conditions on the individual’s predisposing other areas of the body, specifically the hip and gait pattern. low back, to potential injury. With the rise in the use of prophylactic combined knee and ankle bracing in athletics, it RESULTS AND DISCUSSION is important for clinicians to be aware of these possible Average knee, ankle and hip joint angles for the NB, AB, KB predisposing factors, even though the braces may be of some and the ABKB groups were calculated and statistically benefit in reducing injury. compared at the point of peak knee moment (PKM). Figure 1 illustrates a statistically significant reduced knee joint angle at REFERENCES PKM in the KB and ABKB conditions compared to the NB 1. DeVita P., et al. J Biomech, 29, 583-588, 1996. condition. Results also revealed significantly reduced ankle 2. DeVita P., et al. Am J of Sports Med, 26, 778-784, 1998. joint plantarflexion (p = .046) at PKM in the AB trials and a 3. Miller E, et al. P Clin of N America, 37:5, 1175, 1990. significantly reduced hip flexion angle (p = .034) in the KB and ABKB trials. 543
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