Objectives: To determine whether age, body mass index (BMI), hand length and forearm circumference were predictive of hand grip strength in healthy Saudi Arabian adult males. Methods: This cross-sectional descriptive study recruited healthy adult male volunteers. Their anthropometric characteristics including age, BMI, hand length and forearm circumference were measured using routine techniques. Hand grip strength was assessed using a Jamar® Hydraulic Hand Dynamometer. The data were analysed using Pearson correlation coefficient ( r) as well as by a stepwise multiple linear regression analysis. Results: The study included 116 healthy males who satisfied the inclusion criteria. A Pearson correlation coefficient matrix demonstrated that all the four measures, age, BMI, hand length and forearm circumference, were significantly correlated with hand grip strength. Age had an inverse correlation with hand grip strength. The anthropometric measures of hand length, age and forearm circumference accounted for 44.2% (R² 0.442) of the variation of the hand grip strength. Conclusion: Hand length, age and forearm circumference significantly impacted on hand grip strength in Saudi Arabian healthy adult males.

Chest wall circumference measurements are common evaluation methods in clinical settings by therapists in order to obtain chest wall mobility. Previous published results have been conflicting, and there is a lot of variability in the method of testing, which needs testing in different conditions. Seventy subjects (25 healthy nonsmokers, 25 healthy smokers, and 20 COPD) aged between 18 and 70 years participated in the study. Upper and lower chest expansion (CE) measurements (2 levels) are performed with cloth inch tape. Intrarater (between day) and interrater (within-day) reliability of CE measurements was evaluated by two examiners. Lung function parameters, forced expiratory volume in first second (FEV1), forced vital capacity (FVC), FEV1/FVC, and vital capacity (VC) were measured using a computerized spirometer (Spiro lab 3). The intrarater reliability for upper and lower CE showed very good agreement with intraclass correlation (ICC) values between 0.90 and 0.93 for upper CE and 0.85 to 0.86 for lower CE. The interrater reliability for upper CE showed good to very good agreement with ICC values ranging between 0.78 and 0.83, and lower CE showed very good agreement with ICC values ranging between 0.82 and 0.84. Upper and lower CE showed a significant and positive correlation with all lung function parameters, with strong correlation with FEV1/FVC (r = 0.68). Upper and lower CE measurements with inch tape showed good intra- and interrater reliability and reproducibility in healthy nonsmokers, healthy smokers, and COPD subjects. Compared to upper, lower CE correlated well with the lung function parameters. Upper and lower CE may be more useful in clinical practice to evaluate chest mobility and to give indirect information on lung function but interpretation with caution is required when considering implementation into clinical setting.

This study quantitatively assesses the association between age and cervical joint position error (JPE) and compares JPE between young and older asymptomatic subjects. Subjects (n = 230) ranging in age from 17 to 70 years volunteered to participate in the study. Cervical JPE was measured for all subjects with the active movement angle reproduction test in degrees using a digital inclinometer; testing was done in all cervical movement directions (flexion, extension, side-bending right and left, rotation right and left). Subjects were divided into two groups: young (n = 169, mean age: 32.4 years; range 17-49 years) and older (n = 61, mean age: 61.9 years; range 50-70 years) and JPE was compared. Pearson's product-moment correlation coefficients were significant and positive for the association of age on cervical JPE in flexion (r = 0.71), extension (r = 0.81), side-bending right (r = 0.77), side-bending left (r = 0.84), rotation right (r = 0.84), and rotation left (r = 0.84). JPE was significantly larger (for all movement directions) in the older subject group (P < 0.001). Advancing age was significantly associated with the increasing cervical JPE and older subjects showed greater errors when compared to younger subjects.

Background: Neck proprioception is critical in maintaining neuromuscular control in and around cervical joints. Kinesio™ tape may assist in rehabilitating joint position sense. The current study compares Kinesio™ tape’s effects versus a placebo on proprioception in college athletes experiencing mechanical neck pain.Methods: This study randomized sixty-six athletes with mechanical neck pain into a Kinesio™ tape group (n = 33, mean age = 22.73 years) or placebo group (n = 33, mean age = 23.15 years). The Kinesio™ tape group received standard Kinesio™ taping applications with appropriate tension, while the placebo group received taping applications without tension. Outcome measures: The study assessed cervical joint position errors with a cervical range-of-motion (CROM) device, pain intensity with a visual analog scale (VAS), and neck functional disability with a neck disability index (NDI). It tested joint position errors through cervical flexion, extension, rotation left, and rotation right. All the outcome measures were recorded at the baseline and twice more following 3 and 7 days of tape applications.Results: Multivariate analysis of variance test demonstrated a significant reduction in joint position errors in flexion, extension and right rotation following 3 days and 7 days of tape application among the Kinesio™ tape group. There was a significant main effect of time (P < 0.05) for joint position errors in left rotation and VAS after 3 days (p > 0.05), NDI after 3 and 7 days (p > 0.05).Conclusions: The Kinesio™ tape application after 3 and 7 days effectively decreased joint position errors and neck pain intensity in mechanical neck pain participants compared to placebo, while there was no difference between both groups in the NDI.Trial registration: (CTRI/2011/07/001925). This study was retrospectively registered on the 27th July, 2011.Level of evidence: IIB

Stretching is an important part of post ankle sprain rehabilitation, as well as an effective exercise for improving general ankle‐joint performance. But the combination of stretching alongside low‐frequency stimulation has not yet been extensively studied. Therefore, the purpose of the present randomized controlled trial was to compare the combined effects of low‐frequency transcutaneous electrical nerve stimulation (TENS) with proprioceptive neuromuscular facilitation (PNF) on strength, balance, and proprioception among individuals with post ankle sprain. Sixty male subjects with lateral ankle sprain were selected and randomly allocated to three groups: group 1, group 2, and the control group (CG). Subjects in group 1 received the PNF stretching technique combined with TENS. TENS stimulation was provided using two electrodes placed 5 cm apart directly on the triceps sural muscle of the affected leg and a biphasic current with a symmetrical waveform at 50 Hz for 15 seconds, tuned for a 3‐second ramp up time and a 30‐second rest time with a 250‐microsecond pulse duration was given with PNF stretching. Subjects in group 2 received the PNF stretching technique alone. Both group 1 and group 2 received these treatments for 4 weeks (4 days/week); follow‐up assessments were administered in the third and fifth weeks. CG received no treatment; outcome measures alone were assessed. Outcome measures comprised pain, balance, flexibility, proprioception, range of motion, muscle strength, and functional limitation. A mixed‐model ANOVA showed significant interaction (time and group) and the time effect for all the outcome measures (p ≤ 0.05). Group 1 (PNF‐TENS) showed significant improvement for all the outcome variables compared to the other groups. The present study showed PNF stretching combined with TENS for the triceps sural muscle to trigger muscle contraction during the muscle contraction phase of the PNF stretch, compared against PNF stretching alone, produced significant improvements in ankle function for post ankle sprain subjects.