If you begin a new job and decide to reduce your workload and work-family conflict then you will be decreasing challenging job demands.

Reducing workload and work-family conflict addresses hindrance stressors rather than challenging job demands. Challenging job demands are aspects of a job that are demanding but also provide opportunities for learning and achievement, such as tight deadlines or high responsibility tasks. Reducing workload and work-family conflict aims to alleviate stress and improve work-life balance, not necessarily to reduce the challenges that can lead to personal growth and job satisfaction.