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The dangers of sleeping too much. Actress Dakota Johnson sparked debate in December when she told The Wall Street Journal that she could "easily" sleep 14 hours a night. Following the star's comments, sleep experts at Winston's Beds have explained that sleeping too much can be “problematic”. "Generally speaking, adults should be aiming for at least 7 hours of sleep a night in order to re-energise, improve their mood and keep a healthy immune system.” "Although it may sound appealing to some people, 14 hours of sleep would not be recommended. Too much or too little sleep over a long period of time can lead to an increased risk of anxiety, obesity and diabetes.” The expert adds that sleeping too much can "have the reverse effect", leaving you feeling even more tired. "To get the most from your sleep, stick to the recommended amount of time of around seven to eight hours.” "If you're struggling with this amount of sleep it may be time to seek advice from a professional.” The effects of sleeping too much: Increase in tiredness If you sleep too long, you are likely to feel less rested the next day. Back pain Too much time laying down causes your lower back to stiffen up leading to back pain. Low mood Too much sleep and not enough daily activities can also lower your mood and make you more irritable. Headaches Those who oversleep frequently may find they experience more headaches. Some believe that this is caused by a serotonin disruption. Weight gain An inconsistent sleep cycle can disrupt your hormones that regulate your appetite which over a long period of time can lead to weight gain. THIS VIDEO MUST NOT BE EDITED FOR LENGTH TO COMBINE WITH OTHER CONTENT