If you're bored of sit-ups, try this exercise instead.

We do sit-ups to make our muscles strong.

我们做仰卧起坐来使我们的肌肉强壮。

In addition to its health disadvantages, the sit-up is also seen as lacking efficiency.

除了不利于健康，仰卧起坐还被视为低效运动。

Applying Study on The Effects of Cooperative Learning on Teaching of Sit-Up in Junior Girl Students of High School

合作学习法在高一女生仰卧起坐练习中的应用研究

Some people seem to be more prone to back problems caused by sit-ups than others.

对于有些人来说，仰卧起坐似乎更容易产生腰背问题。

When you get out of bed each morning, do five sit-ups first.

每天早上起床时先做五个仰卧起坐。

So sit-ups might lead to back pain, but only in some people.

所以，对一部分人来说，仰卧起坐可能导致背部疼痛。

That's fifty more sit-ups. One, two.

那得再做五十个仰卧起坐。

Sit-ups level a slow down and down trend is obvious.

仰卧起坐水平有下降趋势并且下降趋势明显。

Comparison and Analysis of the Punching Shear Capacity in New and Old Specifications

新旧规范中混凝土抗冲切承载力验算的对比与分析

Stiffness Matrix Formulation of Thick Beams Based on High Order Shear Deformation Theory

按高阶理论考虑剪切变形影响的梁单元刚度矩阵

Twin shear stress three parameter criterion and its corner model

双剪应力三参数准则及其角隅模型

Study on direct soil shear test automatically

土直剪试验自动化的研究

Experiment Analysis for Shear Break of Aluminum Alloy Material

铝合金材料剪切断裂实验分析

Effects of Shear Plane Boundary Condition on Depth of Surface Work hardening

剪切面边界条件对工件表面层加工硬化深度的影响

Research on calculation of shear strength of steel fibre reinforced concrete beams

配筋钢纤维混凝土梁抗剪强度计算方法的研究

Quality control measures of big assembled steel formwork in shear wall structure

拼装式大钢模板在剪力墙结构中的质量控制措施

New strength criterion for rock with shear failure mode

剪切破坏模式下岩石的强度准则

Quality and cost control in plain concrete shear wall construction of high-rise building

高层建筑清水混凝土剪力墙质量成本控制

Simulation of the Deformation of the Endothelial Cell Under a Shear Flow

剪切流动下内皮细胞变形的模拟

Relation between shear parameters c φ and stress state and its application in engineering

抗剪参数cφ与应力状态的关系及工程应用