Physical activity and factor VIII levels in patients with haemophilia: A real-world prospective observational study.

INTRODUCTION: Regular physical activity (PA) is recommended for patients with haemophilia (PwH). For PwH it is crucial to ensure a sufficient factor level to prevent PA-induced bleedings. However, there is a gap in the literature dealing with specific factor levels, which are needed when performing specific types of PA. AIM: To provide data on factor VIII (FVIII) levels at the start of PA performed by PwH. METHODS: In this prospective 12-month real-world observational study, 23 PwH recorded every PA they performed and the FVIII levels at the start of the PA using a pharmacokinetic application. PA types were clustered according to the collision and injury risk into three categories (Cat I = low, Cat II = medium, Cat III = high risk). Haemophilia Joint Health Scores (HJHS) were performed at baseline, after 6 and 12 months. RESULTS: 795 PA sessions of Cat I, 193 of Cat II, and 23 of Cat III were documented. FVIII levels at the start of PA were different between categories (Cat I: 29.8 ± 32.1%, Cat II: 38.3 ± 33.4%, Cat III: 86.6 ± 29.2%). Out of all PA sessions, 145 (14%) were performed at a factor level of ≤3%. Three PA-induced bleeding occurred. Baseline HJHS was 14.5 ± 13.6 points and did not change throughout the study. CONCLUSION: This study provides real-life data on FVIII levels at the start of 1011 PA sessions. PwH are mainly active in low-risk sports with higher FVIII levels observed in Cat II and III, respectively. Only three PA-induced bleeding occurred, even though several PA were started with low FVIII levels.

Smartphone Use-Influence on Posture and Gait during Standing and Walking.

Prolonged gaze at a smartphone is characterized by pronounced flexion of the cervical spine and is associated with health risks. In addition, it is suspected that smartphone distraction could lead to gait changes. Therefore, the aim of this study was to detect smartphone-associated postural changes at thoracic and lumbar levels as well as gait changes. Spinal analysis was performed prospectively in 21 healthy men using the DIERS 4Dmotion®Lab in a controlled crossover design to evaluate posture-associated parameters while standing and walking. The examination sequence provided three randomized gaze directions: GN = Gaze Neutral; S1H = Smartphone one-handed; S2H = Smartphone two-handed. Results reveal a higher vertebra prominens (VP)-flexion in S1H (23.8° ± 6.9°; p ≤ 0.001) and S2H (22.4° ± 4.7°; p ≤ 0.001) compared to GN (17.6° ± 3.8°). Kyphosis angles were also different with higher values observed in S1H (58.8° ± 5.8°; p ≤ 0.001) and S2H (61.6° ± 4.9°; p ≤ 0.001) compared to GN (49.1° ± 4.6°). During walking, similar results were observed in kyphosis angles. No differences were observed in gait during smartphone use (p = 0.180-0.883). The study revealed a significantly increased inclination of the lower cervical and thoracic spine during smartphone use. However, the inclination was larger during S2H. Standing or walking conditions did not affect the measurement outcomes. Long-term smartphone use associated with a larger inclination of the cervical and thoracic spine might result in increased pressure and shear forces acting on vertebral bodies, intervertebral discs, and muscles, which potentially increases the risk of spinal pain and disease.

Relationship between foot pressure and spinal parameters in healthy adults - A systematic review.

BACKGROUND: Foot pressure has an essential impact on the entire musculoskeletal chain. So far, the direct influence of foot pressure onto the spinal posture and vice versa is still unclear. RESEARCH QUESTION: The aim of this study was to determine the relationship between foot pressure and spinal posture in healthy adults under static and dynamic conditions. METHODS: Systematic research was conducted using PubMed to demonstrate the relationship between foot pressure and spinal posture. The search strategy was based on the PICOS selection criteria. The risk of bias within the studies was assessed using SIGN rankings. RESULTS: Based on the search strategy, 719 articles were identified by screening title and abstract. 11 studies with moderate methodological quality partially showed a relationship between foot pressure and spinal posture (SIGN:2-1- and B-D). Apart from the foot pressure, the included studies analyzed parameters of muscle thickness (sonography), trunk displacement, head position, posterior tilt angle, trunk tilt, pelvic rotation, spinal range of motion, or spinal motion. Strength training and increased muscle thickness in the lumbar spine ensure decreased foot pressure. The head position partly induces a change of foot pressure under static conditions. No correlation was identified between spinal posture and foot pressure during forward and backward walking without manipulation. The static and dynamic measurements only show statistical correlations between foot and back muscles. SIGNIFICANCE: Foot pressure and spinal posture seem to be interrelated under static and dynamic conditions. Static and dynamic measurements are necessary for body posture analysis, as the conditions do not always show consistent results. Due to the small number of studies and low sample sizes, further investigations are necessary to gain more precise perception of the interplay of the spine and foot pressure. For better comparison, more homogeneous studies investigating similar spine parameters are needed.

Most subjectively affected joints in patients with haemophilia - what has changed after 20 years in Germany?

BACKGROUND: In patients with haemophilia (PwH), most frequently affected joints are the ankle, knee and elbow. Due to improved factor therapy in the last decades, these previous findings have to be verified in Germany. AIM: The aim of this study is to detect the most affected joint, evaluate the significance of the source of pain and determine the point prevalence of back pain in Germany today. PATIENTS AND METHODS: In a retrospective study, data of n = 300 patients with severe moderate and mild haemophilia were evaluated regarding the most affected joint, the most common source of pain, and the point prevalence of back pain. An anamnesis questionnaire and the German Pain Questionnaire were used for this assessment. RESULTS: The most affected joint in German PwH is still the ankle (41%), followed by the knee (27%) and the elbow (11%). The most common source of pain is also the ankle joint (32%). Back pain was also identified as one of the most common sources of pain, which is comparable to the elbow (elbow:15%; back:13%). The point prevalence in PwH for back pain was significantly higher compared to the general German population (P = .031). CONCLUSION: Our data showed that the ankle is still the most affected joint and the most common source of pain in Germany. These results also showed the relevance of back pain as a pain source. The evaluations also demonstrated the high point prevalence of back pain in PwH. Future therapies should also focus on the spine because joint changes affect posture.

Peak pressure during gait in patients with severe haemophilia: A controlled cross-sectional study.

BACKGROUND: Patients with severe haemophilia suffer from bleeding-related joint changes in which the ankle joint is most frequently affected. In the resulting gait changes, the forefoot is involved by reducing the foot pressure. However, it is unclear which changes in foot pressure are present in the individual's foot zones. RESEARCH QUESTION: The aim of the study was to determine whether compensation mechanisms are present in the foot zones regarding the peak pressure under dynamic conditions and to identify possible underlying mechanisms for gait changes. METHODS: In a controlled cross-sectional study, a pedobarography was performed during gait with a standardized speed (3 km/h) in patients with haemophilia (PwH;n = 40) and healthy controls (Con;n = 40). Pressure pain thresholds (PPT) were detected, and Haemophilia Joint Health Score (HJHS) was performed to determine the current joint status. RESULTS: PwH showed a decreased peak pressure in metatarsals II-IV and heel compared to Con. Patients with major-affected ankle joints (determined with the HJHS) showed a decreased single-step length, stride-length and stride-time. Accordingly, the cadence was increased by 10 ± 11 steps/min in PwH compared to Con. Furthermore, PwH showed decreased ankle range of motion (ROM) in HJHS and an altered pain perception due to reduced PPT. SIGNIFICANCE: PwH showed a changed gait pattern in peak pressure compared to Con. A restricted rolling behavior, which might be caused by movement restrictions and pain sensation, leads to reduced pressure in the center forefoot, resulting in a shorter stride-length. Future therapies should focus on maintaining joint mobility for better rolling behavior and improving ankle joints' stability to achieve a balanced load between the midfoot, heel, and forefoot. The use of insoles adapted to our data, based on group differences between PwH and Con, could be supportive in this case.

Changes of static and dynamic spine alignment in patients with severe haemophilia.

INTRODUCTION: Haemophilic arthropathy results in a restricted range of motion and pain that often affects gait. The effect of these gait changes on spinal posture has not been studied. AIM: To evaluate whether the altered joint situation in patients with haemophilia (PwH) leads to compensatory mechanisms evident in the trunk and spine, considering static and dynamic conditions. METHODS: PwH and healthy controls (20-65 years) were examined using rasterstereography in a controlled cohort study. Analysis was performed in static and dynamic conditions in regard to gait phases. Joint status was determined using the Haemophilia Joint Health Score (HJHS). RESULTS: Static measurements showed no group differences in PwH (n = 40) compared to healthy controls (n = 40) except pelvic torsion (median [25%-quartile;75%-quartile]: -1.9[-3.2;.9]° vs. .5[-1.1;1.9]°; P = .007). In contrast, under dynamic conditions PwH showed significantly higher trunk inclination and lower apex lumbar lordosis in all gait phases. Additionally, pelvic torsion was increased in mid stance and terminal swing. Considering joint status, PwH had a higher global HJHS (23.5[13.0;30.0] vs. 3.0[1.0;5.0]; P<.001). A significant moderate correlation was shown between the HJHS mobility score and spine parameters (r = .228-.588; P<.05). CONCLUSION: Degenerative joint changes in PwH lead to altered spine posture during gait. A reason could be the reduced mobility in the affected joint. Changes in spinal and pelvic posture lead to higher structural burdens; therefore, clinicians should focus on posture of spinal column during gait in daily treatment.