Is this a man's world? The effect of gender diversity and gender equality on firm innovativeness.

Gender diversity is known to have a positive effect on innovation in developed countries. However, it is unclear whether the benefits of gender diversity for innovation also apply to the particular context of developing countries, which is characterized by diverse and lower levels of gender equality. We propose that gender diversity positively impacts innovation in the developing countries participating in our study. In addition, we expect that this effect is moderated by country-specific levels of gender equality. In a cross-country study covering 18,547 firms in 15 developing countries, we find that gender diversity among a firm's owners and workforce as well as having a female top manager benefit innovation in developing countries. Yet, contradictory to our expectations, gender equality does not significantly moderate this relationship. As such, our results underline the importance of enabling and fostering gender diversity and have critical implications for firms and policy makers alike.

Does the Incremental Shuttle Walking Test require maximal effort in healthy subjects of different ages?

OBJECTIVE: To evaluate if the Incremental Shuttle Walking Test (ISWT) requires maximal effort in healthy subjects of different ages. DESIGN: Cross-sectional. SETTING: University-based research laboratory. PARTICIPANTS: 331 healthy subjects separated into six groups according to age: G1, 18 to 28 years; G2, 29 to 39 years; G3, 40 to 50 years; G4, 51 to 61 years; G5, 62 to 72 years and; G6, 73 to 83 years. MAIN OUTCOME MEASURES: Two ISWTs were performed and participants were permitted to run and to exceed 12 levels during the test, if necessary. Heart rate (HR) and symptoms of dyspnoea and fatigue were recorded before and after the test, and the percentage of age-predicted maximal HR (HRmax) was calculated. Maximal effort was defined as HRmax >90% of age-predicted HRmax. RESULTS: Almost 31% of the subjects exceeded 12 levels in the ISWT. At the end of the test, all groups presented a median [interquartile range] HR greater than 90% of HRmax (G1: 100 [95 to 104]; G2: 100 [96 to 105]; G3: 103 [97 to 108]; G4: 99 [91 to 106]; G5: 96 [87 to 106] and G6: 96 [91 to 109]% HRmax). Regarding symptoms, all groups showed higher values after the test (P<0.05). A multiple logistic regression analysis identified female gender, older age and a lower HR before the test as determinants of not achieving 90% of HRmax at the end of the test. CONCLUSIONS: The ISWT requires maximal effort in healthy individuals, but for that it is necessary to extend the test beyond twelve levels. Female gender, older age and lower heart rate before the test are the determinants of not reaching maximal effort.

Efeito de um programa de exercícios direcionados à mobilidade torácica na DPOC / The effect of an exercise program directed to the thoracic mobility in COPD

Introdução: A Doença Pulmonar Obstrutiva Crônica produz alterações mecânicas na caixa torácica que desencadeiam disfunções físicas limitantes das atividades de vida diária e da qualidade de vida. Objetivos:Avaliar os efeitos de um programa de exercícios para readequação do complexo toracopulmonar na mobilidade da caixa torácica, capacidade de exercício e qualidade de vida em pacientes com DPOC. Materiais e métodos: Este estudo avaliou 13 pacientes com DPOC por meio de Espirometria, Teste da Caminhada dos Seis Minutos (TC6min), Cirtometria e Questionário de Qualidade de Vida Saint George (SGRQ). O programa foi elaborado com base em exercícios que objetivam o aumento da mobilidade de caixa torácica, tolerância ao exercício e melhora na resposta subjetiva em relação à qualidade de vida. Resultados: Após 12 semanas de tratamento, verificou-se um aumento significativo na mobilidade da região inferior da caixa torácica (expansibilidadeda região xifoide: de 3 ± 2 cm para 7 ± 4 cm, p = 0,01), na região abdominal (expansibilidade umbilical: de 2 ± 1 cm para 6 ± 4 cm, p = 0,01) e melhora na distância percorrida no TC6min (391 ± 117 minicial para final de 442 ± 124 m, p = 0,04). Na avaliação pelo SGRQ, houve uma tendência sem significância estatística de melhora nos três domínios (sintomas: 37 ± 22 para 26 ± 21; atividades: 64 ± 15 para 62 ±19; e impacto: 42 ± 16 para 38 ± 16). Conclusão: O programa de exercícios respiratórios direcionados ao aumento da mobilidade da caixa torácica melhorou a expansibilidade torácica e abdominal e a capacidadede exercício

BACKGROUND: Chronic Obstructive Pulmonary Disease produces mechanical changes in chest wall and this physical disability reduces the daily life activities and quality of life levels.OBJECTIVES: To assess the effects of an exercise program for Thoracopulmonary Complex Re-Adaptation in the chest wall mobility, exercise capacity and quality of life in COPD patients. MATERIALS AND METHODS: Thirteen COPD patients were studied. Spirometry, Six Minutes Walk Test, Thoracic Mobility and Quality of Life by Saint George Respiratory Questionnaire (SGRQ) were the variables. The exercise program was created based on physical exercises that aim at increasing the thoracic mobility and a better exercise tolerance, as well as improving the subjective response related to quality of life. RESULTS: After a 12-week program, it was observed a significant improvement in chest wall mobility in lower chest region (xiphoid level mobility: from 3 ± 2 cm to 7 ± 4 cm; p = 0.01) and in the abdominal region (umbilical level mobility: from 2 ± 1 cm to 6 ± 4 cm; p = 0.01). There was a statistically significant improvement of exercise capacity (walk distance: from 391 ± 117 m to 442 ± 124 m; p = 0.04). In quality of life assessment by SGRQ, there was a tendency of improving in three domains (symptom: from 37 ± 22 to 26 ± 21; activity: from 64 ± 15 to 62 ± 19; and impacts: from 42 ± 16 to 38 ± 16), but with no statistic significances.CONCLUSION: Respiratory exercises aimed at increasing the chest wall mobility improve abdominal and lower chest expansibility and exercise tolerance.

Postural balance and physical activity in daily life (PADL) in physically independent older adults with different levels of aerobic exercise capacity.

Balance impairs with aging and may cause mobility limitations and functional decline. We aimed to evaluate postural balance and PADL in physically independent older adults with different levels of exercise capacity. One hundred fifty seven physically independent individuals, aged 60 years or older were evaluated. Postural balance assessment was performed during one-legged stance test using a force-platform and maximum exercise capacity with the incremental shuttle walking test (ISWT). PADL was assessed subjectively by the modified Baecke questionnaire and objectively using a pedometer. Based on the performance achieved in the ISWT, according to the percentage of the predicted value, the older adults were separated into 3 groups: low performance group (LP group, ISWT < 80% predicted, n = 32, 19 women), normal performance group (NP group, 80 ≤ ISWT ≤ 100% predicted, n = 30, 22 women) and high performance group (HP group, ISWT > 100% predicted, n = 95, 67 women). The HP group showed better postural balance when compared to LP groups (p < 0.001) and also higher levels of PADL measured with pedometer (p < 0.001). There was a modest correlation (r = 0.45) between exercise capacity and PADL in the LP group and a weak correlation between exercise capacity and balance (r = -28) in the HP group. Physically independent older adults with more preserved exercise capacity have better postural balance and higher levels of PADL in comparison to those older adults who show a poorer condition in terms of exercise capacity.

Reference values for the incremental shuttle walking test.

BACKGROUND: Reference values for the incremental shuttle walking test (ISWT) which are applicable to the whole population need to be solidly established. This study aimed to determine which anthropometric and demographic variables influence the walking distance achieved in the ISWT in healthy subjects with a broad age range and to establish a reference equation for predicting ISWT for that population. METHODS: In a cross-sectional study, 242 healthy subjects (102 male) performed two ISWT and had their weight, height and body mass index (BMI) measured. RESULTS: In general, healthy subjects walked 810 [IQR 25-75%: 572-1030] m in the ISWT, presenting large variability (range 210-1820 m). The walked distance correlated with age (r = -0.76), height (r = 0.49) and BMI (r = -0.23) (p < 0.001 for all), but not with weight (r = 0.06, p = 0.315). A model of stepwise multiple regression showed that gender, age and BMI were independent contributors to the ISWT in healthy subjects, explaining 71% (p < 0.0001) of the variability. The derived reference equation was: ISWT(pred) = 1449.701 - (11.735 × age) + (241.897 × gender) - (5.686 × BMI), where male gender = 1 and female gender = 0. CONCLUSION: In conclusion, the variability of the ISWT is explained largely by gender, age and BMI. The reference values for the ISWT can be adequately predicted using the equation proposed in this study.