Search Results

You are looking at 11 - 20 of 20 items for

  • Author: Michelle A Sandrey x
  • Refine by Access: All Content x
Clear All Modify Search
Restricted access

Nathan J. Crockett and Michelle A. Sandrey

Context:

Few studies have evaluated the long-term effects of prophylactic ankle-brace use during a sport season.

Objective:

To determine the effects of prophylactic ankle-brace use during a high school basketball season on dynamic postural control and functional tests.

Design:

Prospective repeated-measures design.

Setting:

High school athletic facility.

Participants:

21 healthy high school basketball athletes (13 girls, 8 boys).

Interventions:

The order of testing was randomized using the Star Excursion Balance Test (SEBT) for posteromedial (PM), medial (M), and anteromedial (AM) directions and 3 functional tests (FT) consisting of the single-leg crossover hop, single-leg vertical jump, and the single-leg 6-m hop for time at pre-, mid-, and postseason. After pretesting, the ankle brace was worn on both limbs during the entire 16-wk competitive basketball season.

Main Outcome Measures:

SEBT for PM, M, and AM and 3 single-leg FTs.

Results:

Dynamic postural control using the SEBT and the 3 FTs improved over time, notably from pretest to posttest. The left limb was different from the right limb during the single-leg vertical jump. Effect sizes were large for pretest to posttest for the 3 SEBT directions and 2 of the 3 FTs.

Conclusions:

The 16-wk basketball prophylactic ankle-brace intervention significantly improved dynamic postural control and single-limb FTs over time.

Restricted access

Michelle A. Sandrey, Cody Lancellotti, and Cory Hester

Context: Soft tissue restrictions have been linked to poor flexibility and decreased range of motion (ROM). To decrease the soft tissue restrictions and ultimately increase ROM/flexibility, myofascial release techniques, such as foam rolling (FR) and instrument-assisted soft tissue mobilization (IASTM), have been used. However, the benefit regarding which technique is more beneficial remains unknown. Objective: To examine the effects of myofascial release techniques (FR vs the instrumented portion of IASTM) on knee joint ROM, rectus femoris (RF) and biceps femoris (BF) fascial displacement, and patient satisfaction. Design: Randomized controlled clinical trial. Setting: Mid-Atlantic University. Participants: Twenty moderately active participants (age 21.1 [2.0] y) with variable levels of soft tissue restriction in the quadriceps and hamstrings started and completed the study. Participants were randomly assigned to 2 groups, FR or IASTM. Interventions: All participants completed the same warm-up prior to the intervention. The FR group followed the proper FR protocol for gluteals/iliotibial band, quadriceps, and hamstrings/adductors, and the participants were monitored while the protocol was completed. The IASTM group received treatment on the gluteals/iliotibial band followed by the quadriceps, adductors, and hamstrings. Participants in both groups attended intervention sessions twice per week for 3 weeks. Prior to the start, knee ROM measurements were taken, along with fascial displacement measured via ultrasound. Upon completion of the study, posttest measurements were completed. A patient satisfaction survey was also administered at this time. Main Outcome Measures: Pretest to posttest knee ROM measurements, RF and BF fascial displacement, and patient satisfaction. Results: Both groups improved pretest to posttest for knee-extension ROM, with a slight trend toward increased knee-extension ROM for the FR group. Both groups improved pretest to posttest for BF and RF fascial displacement, in favor of the IASTM group for BF fascial displacement. Both groups were equally satisfied. Conclusions: As both groups improved pretest to posttest, either treatment could be used.

Restricted access

Michelle A. Sandrey

Column-editor : Jeff G. Konin

Restricted access

Vincent J. Leavey, Michelle A. Sandrey, and Greg Dahmer

Context:

There are few outcomes-based studies that address hip strategy and gluteus medius strength (GMS) for maintaining dynamic postural control.

Objective:

To determine whether GMS training, proprioception training, or a combination of the 2 has an effect on dynamic postural control.

Design:

Pretest-posttest, repeated measures.

Setting:

Sports-medicine clinic.

Participants:

48 healthy male and female college students obtained via sample of convenience.

Interventions:

Three 6-wk programs including exercises for proprioception, GMS, and combined.

Main Outcomes Measures:

Eight Star Excursion Balance Test (SEBT) reach distances and GMS for the dominant leg.

Results:

There was no significant difference between groups. The combination group demonstrated the most improvements in SEBT reach distances, whereas the GMS group demonstrated the most improvement in GMS.

Conclusion:

Use of exercises for proprioception, GMS, or a combination of the 2 will help improve dynamic postural control in healthy, active individuals.

Restricted access

Michelle A Sandrey, Carole J Zebas, and Joseph D Bast

Context:

Soccer is a sport that includes running in several different directions. For this reason, it is important for the shoe to control the motion of the foot.

Objective:

This study was undertaken to compare rear-foot motion in high school soccer players with excessive pronation under the experimental conditions of barefoot (BF), experimental shoe (ESS), experimental shoe with arch support (ESSAS), and the experimental shoe with pronated lacing technique (ESSPLT).

Design:

1 × 4 factorial.

Setting:

Biomechanics laboratory.

Patients or Other Participants:

20 male and female subjects with excessive pronation in both feet (N = 40) as determined by navicular height and arch index.

Interventions:

The subjects were filmed with a 2D Peak Performance video system as they ran a specified course. Rear-foot motion was determined by rear-foot angle measurements from the point of foot-fat to heel off.

Main Outcomes Measures:

There would be a difference with rear-foot motion between the three experimental conditions.

Results:

Results of the study indicated significant (P ≤ .05) differences between the conditions of BF and ESS, BF and ESSAS, BF and ESSPLT, and ESS and ESSPLT.

Conclusions:

In the experimental conditions, the shoe with the pronated lacing technique was superior in its effectiveness to control rear-foot motion.

Restricted access

Michelle A. Sandrey, Yu-Jen Chang, and Jean L. McCrory

Context: Lower-extremity stress fractures (SFx) are a common occurrence during load-bearing activities of jumping and landing. To detect biomechanical changes during jumping postinjury, a fatigue model could be used. Objective: To evaluate muscle activation in the lower leg and tibial accelerations (TAs) prefatigue to postfatigue following a jumping task in those with and without a history of SFx. Design: Repeated-measures. Setting: Athletic Training Research Lab. Participants: A total of 30 active college-aged students with and without a history of lower-extremity (leg or foot) SFx (15 males and 15 females; 21.5 [5.04] y, height = 173.5 [12.7] cm, weight = 72.65 [16.4] kg). Intervention: A maximal vertical jump on one leg 3 times with arms folded across the chest prefatigue to postfatigue was performed. Fatigue protocol was standing heel raises on a custom-built platform at a pace controlled by a metronome until task failure was reached. Legs were tested using a randomized testing order. Electromyographic (EMG) surface electrodes were placed on the medial gastrocnemius, soleus, and tibialis anterior following a standardized placement protocol. A triaxial accelerometer was attached to the proximal anteromedial surface of the tibia. Main Outcome Measures: Linear envelopes of the medial gastrocnemius, soleus, and tibialis anterior and peak accelerations (resultant acceleration takeoff and landing). Results: Significant interaction for leg × test for tibialis anterior with a posttest difference between SFx and control (P = .05). There were decreases in EMG linear envelope following fatigue for medial gastrocnemius (P < .01) and tibialis anterior (P = .12) pretest to posttest. At takeoff, TA was greater in the SFx contralateral leg in comparison with the control leg (P = .04). At landing, TA was greater in posttest (P < .01) and in the SFx leg compared with SFx contralateral (P = .14). Conclusion: A decrease in muscle activity and an increase in TA following fatigue were noted for all subjects but especially for those with a history of SFx.

Restricted access

Steven A. Denhup Jr., Michelle A. Sandrey, and Andrew H. Hawkins

Column-editor : Malissa Martin

Restricted access

Jeffery L. Huston, Michelle A. Sandrey, Mathew W. Lively, and Kevin Kotsko

Context:

There is limited information on the effect of dynamic fatiguing of the plantar flexors on joint-position sense (JPS).

Objective:

To examine the effects of fatigue on JPS for ankle plantar flexion (PF) and dorsiflexion (DF).

Design:

A 2 × 2 factorial design.

Setting:

Research laboratory.

Participants:

20 healthy subjects (10 men, 10 women; age 21.75 ± 1.48 years).

Interventions:

The subjects were tested at 10° DF and 20° PF in the nonfatigued and fatigued conditions on a custom-built JPS device. To induce fatigue, subjects stood with both feet in the plantar-flexed position until they could no longer hold the posture.

Main Outcome Measures:

JPS absolute error was measured at 10° DF and 20° PF.

Results:

There was no significant main effect for condition, measurement, or interaction between condition and measurement.

Conclusion:

With no difference between conditions, the main controller of conscious JPS of the lower extremity might be the tibialis anterior.

Restricted access

Kathleen R. Lust, Michelle A. Sandrey, Sean M. Bulger, and Nathan Wilder

Context:

With a limited number of outcomes-based studies, only recommendations for strength-training and rehabilitation programs can be made.

Objective:

To determine the extent to which throwing accuracy, core stability, and proprioception improved after completion of a 6-week training program that included open kinetic chain (OKC), closed kinetic chain (CKC), and/or core-stability exercises.

Design:

A 2 × 3 factorial design.

Setting:

Division III college.

Participants:

19 healthy baseball athletes with a control group of 15.

Interventions:

Two 6-week programs including OKC, CKC, and core-stabilization exercises that were progressed each week.

Main Outcome Measures:

Functional throwing-performance index, closed kinetic chain upper extremity stability test, back-extensor test, 45° abdominal-fatigue test, and right- and left-side bridging test.

Results:

There was no significant difference between groups. An increase was evident in all pretest-to-posttest results, with improvement ranging from 1.36% to 140%.

Conclusion:

Both of the 6-week training programs could be used to increase throwing accuracy, core stability, and proprioception in baseball.

Restricted access

Kim M. Samson, Michelle A. Sandrey, and Allison Hetrick

Column-editor : R. Barry Dale